I'd go reference cooler whatever card you choose, the blower style.
Having the Sapphire dual-triple fans coolers fill the inside of the case with GPU heat is causing issues. Heat rises heating up my Hard Drives over 8 Degrees celsius hotter under load.
At least reference cooler moves all the GPU out of the case... Just my two cents.
As far as the best GPU for your dollar and if your budget is in the $150 range would probably be GTX 980 even I see them dropping prices like mad.
GTX 980 has 64 ROP's unlike all RX-series 32 ROP's, and GTX 980 has 170 watt TDP unlike R9 390X 275 Watt TDP...
As for right now GTX 980 is the bang for your buck card on ebay among other places.
I'd wait for 8 GB video memory man... Go RX480 with 8GB reference blower and all... I'll build you a BIOS that won't let the card fail on you and run cool & quiet.
Or On Your $140 Budget ... The 4GB R9 370 isn't bad... OEM Only R9 370
Radeon R9 370 (OEM) 6 May 2015 Curaçao Pro - GCN 1st gen 28nm - 2800 PCIe 3.0 975Mhz Core 5600Mhz Memory
1024:64:32 30.4GPixel/s ---- 60.8GTexel/s - 4096MB ---- 256 BIT GDDR5 179.2GB/s
Its the same as R7 370, and they are amazing cards and can clock very high. Using VBE, stock volts is 1.188v and 1.200v is max unless 2x 6pin means 1.225v... I had x1 6 pin 1.200v max but OpenCL clocks up to over 1,350Mhz core. Gaming though it can go up to over 1,200Mhz... With x2 6pin Power it can do 1,250Mhz Core... That's 40 GPixel/s and 80 GTexel/s.
For that price, the AMD 370 can play up to 2720x1530 over AMD VSR... Typical Gaming 2560x1440 without an issue from my experience it works very well on titles like Quantum Break at 1440p among other titles. It can do 3840x2160 over HDMI 2.0 on a 4k native display though as well.
8GB Reference RX 480 ... $225 (Good Deal For 8GB) (Throw Offer .. $135 + $5 shipping = $140 shipped 8GB RX480)
4GB Reference GTX 980 ... $250 (Not Bad With 64 ROPs vs RX480 32 ROPs) (Though RX480 gets A-LOT-DONE on 32 ROPs)
http://www.ebay.com/itm/EVGA-NVIDIA-GTX-980-SC-/122151749879?hash=item1c70cfc8f7:g:f28AAOSwYIxX5-2CEdited by chris89 - 9/27/16 at 8:24pm