Never owned one myself, but seen a few and have read a bit about them. I'd check out the ThemeScene HD70, seems to be getting good reviews. Also the Optoma HD700X. They're both around 400 quid and remember you'll need to spend £100 on a screen.
best bet is go to a dealer and ask for a demo to see what you like. Also have a browse through What HiFi and Home Cinema to see prices and specs - beware of their reviews sometimes though as I think they are heavily influenced by their advertisers.
took your advice on the Themescene hd70
after a chat with the techy-geek at maplins who was very helpful, made me way into town to audio-t, got a demo and snapped up that little beaut with a screen as well for £500! result
it was reduced from £800 (inc screen) down to £550 and was his last one, so I asked him to knock another £50 off which he did :shock:
best price on pricerunner for projector alone was £446, so me thinks I got meself a bargain.
good work fella cheers