Definitely getting a Revolution. Have NES, SNES, and N64, but i'm missing the GameCube... I feel I'm missing out on a lot of good games

. Hopefully a backwards-compat Revo will remedy that. Most likely I will be the sole provider of Nintendo within my group of friends, and given the fun of 4-player N64 even now, it won't be a bad decision.
I won't be getting the PS3, but I fully expect to play it lots. I have multiple friends with Playstation 1's and PS2's and multitaps for both -- bound to be one PS3 buyer there
That leaves Xbox 360... if it's not outrageously large and expensive, I might get it as secondary console... Doesn't seem feasible as a 4-player party console. This will all hinge on my money vs. how much I want to play the Project Gotham series (wicked racing, wicked) and Rare games... single-player. Live won't be worth it given how busy with school and work I expect to be. Won't decide until the price drops =)