Right now, I only game I play is WoW, and I'm pretty sure this build will run it at high/max settings.
I plan on buying Crysis, L4D, Mirrors Edge, COD5, Fear2, Fallout 3, Oblivion, HL2, Assassins Creed, Bioshock, and alot of other games, after I build this system.
I've read a few articles and benchmarks and it looks like the 4850 512mb and GTS 250 512mb are pretty close in performance, and the 4870 and gtx 260 and also pretty similar.
Right now, I'm leaning a little towards the 260. I believe it performed a tiny bit better than that 4870 in most games, and it comes with farcry 2 and cod (which I planned to buy anyways) and a $30 MIR, so it has a total value of only $100!
Also, if I do get a 260 or 4870, would the performance become slowed, even with an overclocked e5200?
Thanks for reading this wall of text!
Feedback? Opinions on the video cards, and the system and a whole?
Get one 4850 now and a second one when you can. This will give you adequate performance up front on a 19" monitor, but will also give you an upgrade path that is easy and inexpensive.
That's the way I would try to go.
Your build is nice, but I have a problem relying on that large an overclock for your performance. You may get an E5200 that does as well as the one in the System Builders Marathon, but you can't count on it. The extra core in the AMD CPU will be big going forward in the coming year... WoW is already using up to 4 cores now.