Xbox 360 Premium Pack
Project Gotham Racing 3
extra Official Wireless Controller
This pack is £299.99 on the website, but with careful use of the 10% discount voucher (BJ4876) it brings it down to £270.
Also...don't forget 2.5% Quidco for hardware sales
...and if you have a HMV Games Rewards card, I think you'll get about £15 worth of points.