Yeah the 360 is the one with the best games by far. Get it because it's cheaper than the PS3 and has higher quality games than the Wii (so far)
Mass Effect for 360 looks soo amazing. It recently got a 9.75/10 score from a very good review.
Here's a list I made of good games coming out or already out on 360:
Gears of War
Bioshock
Elder Scrolls IV: Oblivion
Tom Clancy's Rainbow Six: Vegas
Dead Rising
Crackdown
Forza Motorsport 2
Geometry Wars: Retro Evolved
Lost Planet: Extreme Condition
Dead or Alive 4
Burnout Revenge
Tom Clancy's Ghost Recon Advanced Warfighter 2
Eternal Sonata
Viva Pinata
Call of Duty 4
Halo 3
Half-life 2, episode 1, episode 2
Blue Dragon
Portal
Team Fortress 2
Stranglehold
Mass Effect + sequels
Halo Wars
Rock Band
Guitar Hero 3
Assassin's Creed
Skate
Resident Evil 5
Ninja Gaiden 2
Devil May Cry 4
Soulcalibur IV
Beautiful Katamari
Left 4 Dead
Banjo Kazooie
Tom Clancy's EndWar (looks amazing)
Time Shift
World in Conflict
Fallout 3
Legendary: The Box
Star Wars: The Force Unleashed
Grand Theft Auto IV + sequels
Bully: Scholarship Edition
Chronicles of Riddick: Assault on Dark Athena
Enemy Territory: Quake Wars
Every Extend Extra Extreme (looks like a crazy shoot em up)
Fable 2
Silent Hill 5
Too Human
Unreal Tournament III
Dungeon Hero
+ loads more
I can't praise the 360 enough, it's such an awesome gaming machine.
Nintendo has zelda and mario which are really good but you'll get bored quick after you finish them. The controls on Wii sound like a good idea but in most games they don't work out too well.
The red ring thing is fixed with the newer machines, just make sure you get a new one