It's unclear what you are planning to use your projector. I've had a Panasonic PT-AX200 for over a year now in TV/movie/game use, and just love it. It's 720p, but its big brother and competition sell decent-to-good 1080p projectors for a bit over two grand EUR/USD.
What was said about brightness is an issue. My Panny is one of the brightest ones, and you still need pretty dark curtains to watch TV during midday. Please note the two grand 1080p projectors are not as bright.
But you can't beat the picture quality, no screen door effect, smooth, accurate picture. I currently have an 86" screen. I used to have 120" in my previous apartment. You'd have to pay ten times as much at least for a plasma or LCD of the same size, and the quality is the same or better. Especially if you calibrate yours (I used my Spyder2), resulting in accurate colors. Movies look amazing, 720p TV looks great, and games are more immersive. It's the best investment in home entertainment I've ever made.
And don't worry about the screen - it's the biggest rip-off in home theater industry. I got some Carada samples, and the highest gain sample slapped on my white wall was indistinguishable from the wall itself. So for my new apartment I bought a custom-sized 16:9 artist's canvas. It's flat, beautiful, calibrated well, and is almost tenth the price of a mid-range projector screen!
For all the info and reviews you need on projectors, surf to projectorcentral.com