For bundles you'd be better looking at GAME (
www.game.net), If you see none you want just get a premium console and you can then get games for £20-£25 each from play asia (
www.play-asia.com) a lot of these games are region free so they will play on any xbox 360 just about, but always read carefully before ordering since not all do work.
Current must have games for the 360:
Call of Duty 2
Ghost recon: Advanced Warfighter
Fight Night 3
Hitman: Blood Money
Project Gotham 3
Need for Speed: Most Wanted
The Elder Scrolls IV: Oblivion
Quake 4
Burnout revenge
Dead or Alive 4
MotoGP 2006
Perfect Dark Zero
Upcoming titles this year (some may move to next year):
Splinter Cell 4: Double Agent
Tom Clancy's Rainbow Six: Vegas
Enchanted Arms (looks to be a great Japanese RPG)
Brothers In Arms 3: Hell's Highway
Gears Of War
Need For Speed: Carbon
F.E.A.R. 360
Call Of Duty 3
As you can see there's a ton of current and upcoming games this year to choose from. You probably have played some of these on PC or another console but these are probably the most popular titles on Xbox 360. I probably missed a few though.