Virtually all front projectors are either lcd or dlp, with a few lcos around. Same goes with rear projectors, but with a lot more lcos available. Lcos, or liquid crystal on silicon, to me, seems to be the best technology. Seems that the only reason it isn't dominant yet is due to production problems (low yields).
I have a friend that has been using an lcos (I believe) front projector for his computer for a few years. Its a weird resolution, that required some tweaking to get working properly. However, it does work. Then again, the projector was more than 5k at the time, and has probably spent another 2-3k on various other things to get it working.
I'm not sure if your referring to front projectors or rear. But if your talking about rear, they are pretty silent. Definitely fine for a living room.
Personally, unless you have a lot of money and a lot of space and a lot of time for installation(if you can do it yourself, otherwise prepare to spend a lot of money on a professional installer), rear projection is the way to go. You can buy a 60+ inch 1920x1080 lcos or dlp set for well under 10k (around 5-7k I think). Good luck finding a front projector with that resolution for under 10k. Oh and throw in several hundred(at least) for a decent screen with high gain.
Also, don't plan on having the lights on or daylight coming through a window while you use a front projector. While they have improved a lot in lumens, they still work best in a darkened room.