I love my SSD. I got one for games only. I didn't put windows on it b/c I only got a 120gb and I use it for Steam as well.
120g really isn't enough for all the games I want to have so I'm constitantly having to uninstall older games that I prolly shouldn't keep around in order to re-install my new games. It made a HUGE difference for WoW too.
What I have considered doing is getting a small 64gb SSD for Windows only since 64gb SSDs have come WAY down in price.
When I built my system just about 13 months ago. I went with the top end i5 as it was significantly cheaper than the i7s. I haven't checked the price recently though.
When I built mine I was able to get away with the transition from a laptop to a desktop (so I needed a power supply/case/etc) for about $1600 after rebates. And it has upgrade potential b/c of the ram slots and SLI. So far I haven't had a need to upgrade. I've been able to run everything at max settings that I've played with no slowdowns including Sniper Elite V2, Diablo 3, WOW, ARMA II, etc.
Sorry for the ramblings, hope that helps at least some.
