Re: £2000 to spend on a cinema setup
My advice would be to read some reviews; get What HiFi and What TV. Once you've seen what you can get for the money you're looking spend, go out and have a look/listen to the stuff you've been checking out in the mags.
It just happens that I've spent about £2000 over the last few months on my home cinema stuff. TV is a 46" LCD Samsung (£1000), Amp/Receiver is a Denon AVR-1508 (£200) and the speakers are the 5.1 KEF-1005 kit (£300). I've recently added a pair of Q-Acoustics 1050i speakers too (£350) for music. The KEF's sound awesome but are a little lacking in the woofer range for music on their own. Now I've got it setup as I like it, it sounds fooking amazing. The Denon amps are great value, I would never have thought a £200 amp could have so much kick with really crisp quality.
The point is, you should be able to get some really nice kit for £2k. Just take your time and don't buy anything without seeing/hearing it in action.
As for a projector, IMO you'd have to spent all the £2k and maybe more to get a satisfactory image. And then there's the problem of bulbs. £250-500 for a bulb every 6-18 (depending whether or not you smoke) months or so is enough to put me off.
How big is the room your setup is going in? This will be a major factor in choosing speakers. Anyone who knows there sh!t in a hifi store will ask you this.