Definately the DS version.  Super Circuit is close just because it's more or less a remake of the original one.

Dead Rising, Burnout Revenge, Table Tennis, Saints Row, and Arcade Unplugged are my suggestions. And then download Symphony of the Night and Contra.Hoffgod

Crap.  I forgot about Symphony of the Night.  I've been playing DS castlevania a bunch and can't believe that I missed something so similar to metroid! 

Yeah, definitely get R6:Vegas. It's got a fantastic MP so anyone who likes playing tactical shooters with other people has to get that game.

You could pick up GRAW 2, Burnout: Revenge, and Forza 2. I've heard good things about Viva Pinata and Kameo but haven't got to play much of either.

the-very-best

Thanks.  I'm mainly looking into MP games that I can play with my buddies after I move this summer.  I actually feel spoiled for all the new opportunities that I have for games:P 

Why would you buy a system and not be sure of what games to buy for it?! Do some freakin research.
majadamus

whoa, festus!  I've been looking at this for over 3 months.  I was just hoping for some friendly opinions on some of the games I want to buy.

Alright... some real suggestions.

Definitely get Zelda and Super Paper Mario for the Wii, consider WarioWare and as well.  For the 360, Gears of War, obviously... and Dead Rising, Oblivion, Lost Planet, and Crackdown are good choices as well.

TDLlama

wow, one of the 4 or so actual responses that wasn't a fanboyish argument.  I've got Zelda and am thinking about getting SPM.  The 360 is the new thing so I'm looking for games for it.

Lost Planet, Call of Duty 3, and Oblivion are what I'd get right away.kiruyama

How is Call of Duty 3?

Yeah, I'm not expecting 360 quality.  I was actually happy with the build that they showed in September.

I have both of those games, I would say Lost Planet and Oblivion.ArisShadows

Is Rainbow Six worth it?  I know that I'll eventually end up getting Oblivion.