It looks pretty good. You seem to be getting a fair bit of kit for £2000.
It's very similar to my current set-up, however, as I bought all mine separately, it set me back around £3500 (although the TV is a 46 inch)
Personally, I wouldn't wait for Vista. I tend to wait around 6-8 months after a new OS is launched before taking it on.
The system you are thinking of includes XP Media Centre, which will happily cater for your needs.
It would be a good idea to go into PC World and ask for a demo, including the functionality of Media Centre.