Minor bumpt to chime in that I have a 335 with a q6600 and the Noctua HSF - quite a monster on the scale of the Prolimatech - just fits with a few milli to spare, so don't be too frightened of going for chunky ones.
The Arcti Coolking Freezer 7 Pro [or freezer 64 in yoru case] is quite good - got my Q6600 to 3.6ghz but is a bit noisy at load.
Seriously though, there is a decent bit of space available in the 335 if you remove that stupid 80mm side panel shroud, which with decent fore and aft 120mm fans, you just don't need.
I'm running my machine stock at the moment, with the Noctua HSF+120mm PWM fan [came from a Fenrir I never got round to fitting, arf], Radeon HD4850+ TRad2+Noctua NF-P12, and a pair of NF-S12 as case fans. All fans are running just above stall speed, and my temps at the moment are
Chassis - 29deg
CPU - about 30 average when idle, never seen it go above 55
GPU - idles at 35, never goes above 55-60 on furmark
I do whack the chassis fans and the Noctua on the GPU up to max when gaming, but then I don't do that very often.