I recently "up-graded" from a Panny PT-AE2000 to an older Yamaha DPX-1200 DLP projector (720p), which I bought off of e-bay for $313 w/shipping. I am now sold on DLP. My only regret is not having dumped the Panny sooner. It had a sharp, bright picture, but the colors were not right. Subsequently, we dumped our Sony SXRD rptv and replaced it with a 73" Mitsu DLP rptv. The Sony had developed a persistent green tint years before. It didn't bother my wife, but it was driving me nuts. The pictures produced by the above two DLP devices are very pleasing and natural looking. However, the Yamaha does not produce inky blacks, but the black level is good enough for my tastes, especially at $300. The Yamaha, with 1800 lamp hours, is bright enough for my 92" DIY screen (gain = 1), but I wouldn't go much larger.
Because I shelf-mount my projectors and have a very short throw distance, there are only a few DLP projectors, all older, high-end, that work for me. If you ceiling mount, there are many more options. I would suggest looking at a Runco LS-3. I saw an ad recently for a decent used one for $2k. I thought the ad was on Videogon, but I can't dind it anymore.
If you're comfortable buying used, I would dump the Panny asap. There are many better projectors out there.
Many people here on AVS discourage others from buying used, but my one buying experience was a phenominal deal, and I sold 2 low hour used Panny's that were, IMO, very good deals for the guys that bought them.