Which way would you go for Sam's use, Simon, plasma or LCD?
It's difficult to say, Rik, as I don't play games on mine, so I can't really advise as to which is best on that front.
The points Sam made about screen burn and stuck pixels with plasmas is a valid one, but I think today's models are probably pretty immune to such catastrophes. The best thing is to turn down the contrast while playing games. If you're in a fairly dark room, you'll still get good picture quality.
With LCDs, the risks of screen damage are less, but you have to consider the possibility of motion blur, although again, modern panels will probably have more or less overcome this.
Sam, my advice would be to dig around on AVForums, and then go and look at some panels in action in the shops. Ask if they can plug a game in, and see what the quality is like, on both LCD and plasma. Don't forget, under shop lighting, the picture on a plasma may look slightly 'dull', compared to the LCD, but when you get it home, that won't be an issue.
Oh, and if you go for a Bravia, a Freesat box will currently set you back about £150 for the HD version, and about £299 for a recordable one, but I'm sure they will soon come down in price.