x2 what obsidian said, he's right. From what I've seen the V8 performs poorly for its size.
If you're going to spend money on a big heatsink, try to get something that earns a higher place in cooling benchmarks, that's the whole point of buying one.
that new Titan looks damn nice. SunbeamTech CCF has been proven.
From what I heard you need to lap the TRUE to get good performance? I could be wrong.
lapping adds maybe 2-3 degrees, 5 tops. so why giving up your warranty and risking to permanently damage the heatsing?
lapping - smoothing off the surfaces off the cooler and/or cpu so you get better contact
its great to squeeze the last few mhz out of your cpu or lower the temps a little but overall not really worth it unless your pushing everything to the limits or the either is poorly finished to require such things
on the other hand i usually do it to my equipment for the hell of it