I too love my Infocus X1. I am not familiar with any of the other projectors on the market (besides some quick demos at Best Buy/Circuit City) -- but some people, e.g. at AVSForum, think that the X1 competes with projectors in the $1500 pricerange. Btw, I just ran across a year-old PC Magazine that said that the X1 was offering performance at $1,500 (its retail then, I guess) that shortly before cost $5,000.
One of the home theater magazines reviews four <$1,500 projectors in their current issue, so check out your local bookstore. Sorry, I'm not sure of the exact name -- maybe the Sterophile home theater mag.
The X1's bulb-cost of $0.07/hour is well, well worth it. It has completely reinvigorated my interest in films. Be sure to check into using a PC as your video source.