I'm hoping to buy my first projector for home use (computer games & dvds) and have seen these entry level projectors retailing at about £500. I wouldn't like to spend too much more than this. From my very limited knowledge of projectors it seems like they could do a decent job, but would it be worth spending that bit more?
Also - the cheapest players all seem to be LCD; would a DLP be more suitable/better?
Can anyone recommend any of these?

Sharp XG-NV4SE £449
Polysilicon TFT LCD, 700 ANSI Lumen, SVGA (800x600), 310 mm, 4.5 kg, 40 dB, manual lens focus, manual lens zoom

InFocus C40 New! £492
TFT LCD, 1000 ANSI Lumen, SVGA (800x600), 4:3, 16:9, 304 mm, 2.6 kg, 35 dB, manual lens zoom

ASK C40 £516
Polysilicon TFT LCD, 1000 ANSI Lumen, SVGA (800x600), 4:3, 305 mm, 2.6 kg, 35 dB, manual lens focus, manual lens zoom
InFocus X1 £589
DLP, 1100 ANSI Lumen, SVGA (800x600), 4:3, 16:9, 318 mm, 3.1 kg, manual lens focus, manual lens zoom
InFocus X2 £598
DLP, 1500 ANSI Lumen, SVGA (800x600), 4:3, 16:9, 32 mm, 3.1 kg, 39 dB, manual lens focus, manual lens zoom
Replies would be much appreciated!!!