Plenty of good advice there, just wanted to add a couple things:
I have the 60D, and for somebody like me who wants a really good video camera
and a really good stills camera, it's pretty much perfect!
Now, this is all completely up to you... I got my camera from a seller on Ebay, called DigiGood. They sell imported goods, so the products do not have any kind of warranty. The seller does offer a one years waranty of their own, but its up to you if you want to trust them or not. The savings on offer are huge though. If you wanted to go for the brand new 600D from Jessops it would cost you £750:
http://www.jessops.com/online.store/products/80182/show.html
If you bought from DigiGood (or one of the many other imported camera sellers), you would recieve the Rebel T3i, which is the exact same camera, only it's the American import. It would cost you £640, saving you £100:
http://cgi.ebay.co.uk/NEW-CANON-EOS...Cameras_DigitalCameras_JN&hash=item19c4051d73
If you look at the 60D, you'll see you can actually save over £200, as I did. I took the risk on the lack of warranty, but the camera arrived and works perfectly, so I'm happy. The way I look at it, I've never returned anything on warranty before, so I'm expecting I wont have to here either!
Not sure which 50mm prime lens Nick is talking about, but mine only cost £80. It's the cheap and chearful lens, not brilliant, but it does the job and lots of people say good things about it:
http://www.jessops.com/online.store/products/12878/show.html
Just a few options, but it's completely up to you what you choose to do. Good luck!
(i wonder if I should ask for commision on the above links?)