Currently am choosing between these few radiator
Black Ice GT Stealth 420 Radiator - Black

Material: Copper fins, brass chambers
Colour: Completely black
Dimensions: (L x W x H) 479x145x60mm
Connection threads: G1/4"
Weight: approx. 1976g
Mounting threads: On both sides for fans or mounting, on sides for mounting
Mounting thread size: M3
Fan size compatibility: 3x 140mm
Pressure tested: 2 Bar
Other features: Bleeding screw
Black Ice GT Xtreme 420 Radiator - Black

Two-pass pre-cool/aftercool front-rear dual-core flow configuration with a 30% increase in internal flow rates.
Custom MaxFin™ 25 micron Copper Splitter Fin Configuration utilizing 45% thinner fin material yielding up to 50% less pressure drop.
Unique fin configuration eliminates intra-louver accumulation of dust particles for trouble free operation.
Radically optimized 20 FPI (Fins Per Inch) fin density providing dramatically increased heat transfer surface area.
Custom low-profile 2-row 19.0 x 1.2mm MaxFlow™ tubes with twice the waterside surface area of the GTS and 60% frontal area reduction for superior low air-resistance aerodynamics and lower internal flow requirements.
Yields up to 45% more heat exchange capacity than the Black Ice® *Xtreme in both Stealth or Performance modes.
Achieves Black Ice® Xtreme level performance in stealth mode (low-noise/low-airflow conditions).
First dual core computer radiator configured and optimized for 140mm fans.
M4 Threaded Screw Holes for easier mounting and greater adaptability.
Now standard G 1/4" female threaded fittings.
Full high-temper brass structural construction for weight reduction and superior corrosion resistance.
Uses 100% Non-corrosive water-solluble fluxing process.
Fully RoHS compliant.
Full electrostatic polyurethane painting finish for uniform coating with high temperature curing for increased finish durability.
Renowned Black Ice® quality.
Patent Pending Design.
153 x 460 x 55.7 mm
EK CoolStream 420 XTC Series Liquid Cooling Radiator (EK-CoolStream RAD XTC (420))

Materials: Copper fins
Brass chambers
Dimensions (LxWxH): 460x146x55mm
Connection threads: G1/4"
Fins/inch (FPI): 10
Fins/cm (FPC): 3,85
Weight: Approx. 1480g
Liquid Capacity: Approx. 490 ml (16,57 fl oz)
Fan installation: 4 x M3 threads on both sides each (for 3x140mm fan each)
Pressure tested: 1bar
Included: 1x EK-CoolStream RAD XTC 480 (Triple) radiator
4x M3 x 30mm DIN965 screws
4x M3 x 35mm DIN965 screws
Phobya G-Changer 420mm Radiator - Black (35196)

Material: Copper fins, brass chambers
Colour: Completely black
Dimensions: (L x W x H) 479x145x60mm
Connection threads: G1/4"
Weight: approx. 1976g
Mounting threads: On both sides for fans or mounting, on sides for mounting
Mounting thread size: M3
Fan size compatibility: 3x 140mm
Pressure tested: 2 Bar
Other features: Bleeding screw
Am leaning towards black ice extreme as under the feature it state 20 fpi, isn't that the highest in 420 rad that are < 60mm in thickness ? Am i right to say that black ice extreme will be the best in performance ?
Black Ice GT Stealth 420 Radiator - Black
Material: Copper fins, brass chambers
Colour: Completely black
Dimensions: (L x W x H) 479x145x60mm
Connection threads: G1/4"
Weight: approx. 1976g
Mounting threads: On both sides for fans or mounting, on sides for mounting
Mounting thread size: M3
Fan size compatibility: 3x 140mm
Pressure tested: 2 Bar
Other features: Bleeding screw
Black Ice GT Xtreme 420 Radiator - Black
Two-pass pre-cool/aftercool front-rear dual-core flow configuration with a 30% increase in internal flow rates.
Custom MaxFin™ 25 micron Copper Splitter Fin Configuration utilizing 45% thinner fin material yielding up to 50% less pressure drop.
Unique fin configuration eliminates intra-louver accumulation of dust particles for trouble free operation.
Radically optimized 20 FPI (Fins Per Inch) fin density providing dramatically increased heat transfer surface area.
Custom low-profile 2-row 19.0 x 1.2mm MaxFlow™ tubes with twice the waterside surface area of the GTS and 60% frontal area reduction for superior low air-resistance aerodynamics and lower internal flow requirements.
Yields up to 45% more heat exchange capacity than the Black Ice® *Xtreme in both Stealth or Performance modes.
Achieves Black Ice® Xtreme level performance in stealth mode (low-noise/low-airflow conditions).
First dual core computer radiator configured and optimized for 140mm fans.
M4 Threaded Screw Holes for easier mounting and greater adaptability.
Now standard G 1/4" female threaded fittings.
Full high-temper brass structural construction for weight reduction and superior corrosion resistance.
Uses 100% Non-corrosive water-solluble fluxing process.
Fully RoHS compliant.
Full electrostatic polyurethane painting finish for uniform coating with high temperature curing for increased finish durability.
Renowned Black Ice® quality.
Patent Pending Design.
153 x 460 x 55.7 mm
EK CoolStream 420 XTC Series Liquid Cooling Radiator (EK-CoolStream RAD XTC (420))
Materials: Copper fins
Brass chambers
Dimensions (LxWxH): 460x146x55mm
Connection threads: G1/4"
Fins/inch (FPI): 10
Fins/cm (FPC): 3,85
Weight: Approx. 1480g
Liquid Capacity: Approx. 490 ml (16,57 fl oz)
Fan installation: 4 x M3 threads on both sides each (for 3x140mm fan each)
Pressure tested: 1bar
Included: 1x EK-CoolStream RAD XTC 480 (Triple) radiator
4x M3 x 30mm DIN965 screws
4x M3 x 35mm DIN965 screws
Phobya G-Changer 420mm Radiator - Black (35196)
Material: Copper fins, brass chambers
Colour: Completely black
Dimensions: (L x W x H) 479x145x60mm
Connection threads: G1/4"
Weight: approx. 1976g
Mounting threads: On both sides for fans or mounting, on sides for mounting
Mounting thread size: M3
Fan size compatibility: 3x 140mm
Pressure tested: 2 Bar
Other features: Bleeding screw
Am leaning towards black ice extreme as under the feature it state 20 fpi, isn't that the highest in 420 rad that are < 60mm in thickness ? Am i right to say that black ice extreme will be the best in performance ?