My neighbor has a 360, and we play it a lot. It is a very nice system, and I think perhaps sometime in 07 I may pick one up if I can get a good deal on it, or maybe find a sale, or if a price drop occurs.
However, one thing about the Wii, that I want to explain more about when I said its more simple. It is by no means a simple system. Madden is a complex game, and how hard you thrust the wiimote determines if you lob the pass or if you bullet the pass. I hate most newer football games, they have become way over complicated, with too many buttons to push. Like there is a button to guard the football now, well, shouldn't my player already be guarding the football? I mean crap that like doesn't make much sense to me in a video game, its a game. The 360 version of madden sucked IMHO, and was not fun. Too much going on and too many different buttons to memorize. Now, with the Wii, its simply one button and a gesture, or whatever. It is by no means simple, it requires perfect timing to stiff arm or juke someone. However, it just makes more sense once you learn how to play the game. Stiff arming, juking, pump faking, lobbing a pass over the defense, bullet a pass through some defenders, and Larry Johnson rules in that game, I just plow through people with him!
OTOH, games like Gears of War, are awesome and make it totally worth buying a 360 for. So, I am not dissing the 360 in any way, I am just saying that they will both have their merits.
I am a big fan of the tiger woods golf games, and I can't wait for a Wii version, it is going to be the best one on the market because of the game play alone.