You are in the UK so it's likely you have lots of friends/acquaintaces/family members to play on Live with. If so, the 360 is a great choice. Otherwise, I think Wii + one HD console is better (unless you just don't like the Wii's library) than dual HD console ownership because there's so much overlap between the two.
Also I wouldn't worry about the new 360 models. I have a Falcon (which is less reliable than Jasper) and I haven't had any problems with noise, disk scratching, disk read errors or overheating (I run games off the hard drive. Too bad I only have 60 GB). Now my laptop, that can be quite noisy and hot when I'm running modern PC games. Even when it meets the recommended specs no problem. I'm afraid to PC game on this thing. lol. My Falcon has never made me worry like that *knocks on wood since it's only been 7 months.*







