Well now, I just happen to have spent Many hours researching Good air coolers
These coolers are all a Good step up in performance compared to the CoolerMaster 212 Evo :
(in order, least to best - all these coolers should be great for that CPU)
CoolerMaster 612S £37 new on ebay (delivery Inc)
Zalman CNPS10X Performa £27.99 new on ebay (delivery Inc)
Thermolabs Trinity £35 new on ebay (delivery Inc)
Thermalright 140 TrueSpirit £42 new on ebay (delivery Inc)
Thermalright Silver Arrow
Thermalright Archon Rev B
But these next 3 Coolers are in a league of their own:
(on particularly hot OCing chips - Only these 3 air coolers do not experience Thermal Run Away)
(can see what I mean here :
Cooler performance on a Hot chip)
(in no particular order)
NZXT Havik
Noctua NH-D14 £65 new on ebay (delivery Inc)
Phanteks PH-TC14PE
There are quite a few good 2nd hand Noctua NH-D14 on ebay for £40 - is what I just bought for myself - as I will be OCing an older Xeon X5650 which might get hotter than newer chips
£40 - 59 new if lucky