[Jarena]

Working at Gamestop for the last month or so taught me quite a bit about next gen. So here's the wisdom I can pass on to you:

PS3: complete crap, probably for the next year or so too. Sony's trying to shove blue-ray down consumers' throats. Unless you MUST HAVE the graphics (but...you play SE), or you're planning on investing everything in blue-ray DVDs, save your money. The games (that are out) for PS3 are all, without exception, better on 360. If they're not, they suck (really, they do... look at the reviews for the Gundam game)
But there's Resistance: Fall of man, which is pretty fun I hear.
So, a $600 (without HDTV cables, costs extra) machine for playing Resistance, then Metal Gear and Final Fantasy (when they come out)
Lame.
It can play PS1 and PS2 games, though. Huge library.

360: Depends if you're online or not. If you're a big one for internet multiplayer, 360 can't be touched. Good, solid release list of games you'll actually want to play (Halo 2, Gears of War, Morrowind, NBA, Madden, Project Gotham, etc) X-Box Live (the $50/year internet service) can't be touched by anything out now. If you play a lot of games, and if you dig muliplayer that's not splitscreen, go for this. Especially if your friends have this. Biggest next-gen game library of the next-gen systems, but only certain X-Box games work on the 360 (mostly the popular ones). That, and they're easy to find now because they've been out for a year.

Wii: This is the one I have. I don't recommend this if you're a hardcore "gamer", because you'll be left wanting your halos and final fantasies, but this system is nothing but pure, unadulterated fun - provided you have people around. The controller is a wireless motion sensor that translates your actions into what your character is doing on-screen (it's your gun for shooters, your sword, your tennis racket, etc), but this is one of the best things to do when you're looking to kill time with friends. I got mine about a week ago and picked up a few extra controllers while I was on Thanksgiving break. Once I brought it to school my roomates and I set the system up in our lounge and started playing. Within an hour nearly EVERYONE in the hall was crowded into the lounge area. It's almost a spectator sport. It's the kind of thing that breaks down barriers. EVERYONE wants to play it (whereas, say, the shoot-em-ups on the X-Box turn people off, as does Madden, or Gran Turismo, etc) but within the last week, our floor (and whoever else wanders by) has, for the most part, been playing the Wii instead of going to the pre-finals parties.
That's some draw.
Haha, I'm going on and on about this but I am a Nintendo fanboy. Get this one for sure if you spend a lot of time around people, it's definitely worth it.
(plus, you can download the classic NES/Super NES/N64/Sega games too... for cost, at least - but it's cheap)

As an aside, working at Gamestop has taught me more about video games than I ever wanted to know. If you have any questions... don't hesitate.

(ps, someone bought SEV at our store the other day. I sent him to download BalanceMod, haha)