Crysis runs decently on my 24" with the 2600. Using XP, latest XT drivers, GPU slightly overclocked, and a custom config file at around 1400x900. FPS usually in the high teens to low twenties in outside environments (inside I get high twenties to low thirties). Not great, but acceptable for me. And with the custom config file it really does look great (I'll post some screens later if I have time). Temps stay under 60 with the fans turned up so I'm not too concerned about the OC.
I could definetly go for one of those 8800s though. I just bought my iMac (my first Mac purchase ever) about a month ago on an impulse. My wife has always been an Apple fan, and I had a bonus check, tax refund, and the upcoming tax rebate burning a hole in my pocket. Too bad I hadn't discovered all the Mac forums and resources on the web yet. Could have had a *significantly* better machine. Oh well, live an learn. Plus, it is still a very nice computer. It may have converted me into a Mac fan
Chasing the latest and greatest only leaves you continually disappointed and broke anyway.