To keep it on subject of LCD projectors, there are 3 basic specs to consider
1.Nartive resolution(800x600,1024x768,etc)
2.Contrast ratio.
3.How bright in lumins.
There are other things, but I start first with thoes.
Sometimes the biggest difference between a $3500 and 30,000 unit is brightness. The $3500 has 1 lamp and can output 1200 lumins.
The $30,000 has 4 lamps and can output 7000 lumins and 4~8 times the heat and $3000 long throw lense to project to 30x20' screen 40' away. And vaporize a bull dozer, OK I'm kidding about the bull dozer part.
In a front projrctor HT ambient light can washout the picture so it has to be controled. Rear projectors are less sensitive to room lights.
So as long as you can control the ambient light in your viewing room it should look as good there as id did in the show room.
Yes, I remember the first color TV I saw in '56, it was color and it was realy bad. It had about 12 controls on the front to adjust the color, get it looking good then change the station and readjust all over again. John