Quote:Reasons for R4 vs R3
2x 140mm fans will move about the same air at same noise as 3x 120 fans
All vents accept 140mm fans (R3 back and front are 120mm)
4 instead of 2 USB sockets
More clearance for cooler. (new cooler are getting bigger all the time)
5 bay HDD rack removal. (R3 is fixed rack)
Slide out filter on bottom for both PSU and bottom fan (R3 is only PSU and have to turn case on side to clean bottom fan filter.
More room for cable management.
I have old R2 and love it but would get R4 titanium if I was buying new.
Maybe look around for a used R2/R3. I got mine for £35 delivered and see them on forums for £50-60.