I'm looking at the same - going to audition the Sanyo PLV-Z700 (£1,000), InFocus IN80 (£1,600) and the Panasonic PT-AE3000 (£2,000). Okay - it looks a bit unfair a comparison at this stage but the main thing is to see what the extra money gets you given these are all 5 star rated projectors i.e. I'd expect quite a big difference in quality between the Sanyo and the Panasonic! Once I've done that, I'l have a look at the other competition in that price bracket.
Found somewhere I can demo the InFocus next week, just need to find somewhere which stocks the other two (though to be fair, I haven't really looked that hard yet!).