I'm comfortable with the 4.0GHz mark and performance, don't feel I really need more than that for the moment. Considering I'll probably stick with this CPU for 4 years (my usual time between major upgrades), video card for another 1 (usually replace every 2), and I live in a damn hot country (at the time of this post, 32c ambient temp), I don't want to push it too much now, and leaving a good headroom on both CPU and GPU for a late push closer to their replacement sounds like a plan
F1 2010 for instance, managed to run it earlier today on 91fps max, 70fps avg with 8xMSAA. For me that's already great enough
FSX runs capped to 30fps for better overall performance, GTRē / rFactor are easily over 60fps even under hard conditions, like GTRē rain + night + 35 AI grid at Spa, and last but not least Shift 2 Unleashed is around 60fps avg. Other games, like CoD series, are also over 60fps with all graphics settings I like to have.
... and no, did not and will not
test Crysis with it lol.