Maybe as high as $1,500
yes
direct tv, may change
Right in Houston
Don't misunderstand - you'll be able to find a 1080p LCD for around $1,500, but probably not a top quality known brand. (Now watch somebody post a link to one, and prove me wrong. LOL.)
The reason I recommend a 1080p model is because a significant amount of programming is in 1080p, and if you but a 720p display, the 1080p programming will be scaled to fit, and scaling can cause visual problems.
Also, standard definition material generally doesn't look as good on an HD display as it does on an SD display. So be it.
A final note: You should get a good roof antenna also. You will be absolutely blown away by an OTA (over the air) pic on a high grade 1080p display, like the Panasonic above. Absolutely blown away.