Depending on how much you want to spend: Under $3500 go
here.
Over $3500 go
here.
You really need to do some mega research, it is too personal of a decision, there is no "right" answer. There are problems with all of them, from dust blobs to dead pixels to non-synching via DVI to bulb blowouts to contrast or lack of to light controlling your room.
One word of advice, do NOT buy a pj to use as a regular TV. They are not designed to be turned on and off multiple times daily, as it stresses the bulbs and will lead to premature burnout. I use mine almost daily, but once I turn it on, I leave it on until I am sure I am not going to watch anything else that day. I usually don't fire it up unless I am darn certain that I am going to watch something.
I have a Studio Experience 2HD (Sanyo PLV-Z2 rebadged by Boxlight), it is 720p native resolution LCD with 16:9 panels. It has DVI, Component, S-Video and Composite inputs and looks fabulous; cost around $1800. I have a 110" screen that I built myself from blackout cloth purchased at JoAnn Fabrics and stretched over a 1" x 4" frame, total cost about $40.
Bulbs cost about $300 each, so be certain you can afford a replacement at anytime as they are not guaranteed beyond the first 90-120 days of ownership. Your mileage may vary. I had my first bulb blow at 374 hours, but luckily I was just under the warranty for my pj. So it's not such a shock to purchase a bulb outright, I started a bulb fund; for every hour I watch the pj, I toss a quarter into a glass jar.
If all this hasn't scared you off, go for it, it is an immersive experience that is beyond description.