I would go check out
http://www.projectorcentral.com that is where many of Front Projection people start. Great website to read about LCD, DLP, and other technologies, and recommended projectors. If you've demoed the 4805 and like it that is great. Personally, I suffer from rainbow's on DLP's and other artifact issues, so I took the LCD route and use a Sanyo Z2. Also, you need to think about what you may use it for, I watch a lot of DVD's, but also watch HD, so it was important for me to get a 720p projector. I'm also a DIY guy, so I built my own screen.
Axiom 60's 150 350 4-Qs8's
Denon 2805
Sanyo Z2 WXGA projector
Panasonic S97S HDMI DVD
Samsung HD Tuner
