I'm not sure if Gamestation are still doing this or if it was a Christmas special but in-store only they were offering a premium pack with extra wireless controller, PGR3, Live Arcade Unplugged and any 3 games of your choice for £334.
Or there's this from Play which is sold out at the mo but should hopefully come back in stock soon:
Gears of War Game
Project Gotham Racing 3 game
XBox 360 Live Arcade game
20GB Hard Drive
2 Wireless Controllers
Headset - Voice Communicator
Component HD AV Cable (with SCART adaptor)
XBox 360 Console
http://www.play.com/Games/Xbox360/4-...searchsource=0
Blockbusters also had a really good in-store offer similar to the Gamestation one but it was any 2 games plus £50 of rental vouchers for £330 or £320.
You are better off going for a wireless headset and a quick charge kit.