I have a Phillips Plasma. Pick the TV you want and then comb the sales papers and the internets. I got mine at a memorial day sale at Best Buy.
That's the best advice right thar. Simply because one of the big three retailers will always have some sort of sale, and the installation typically comes free as part of the package.
I have a Samsung 40" and a Vizio 26", both LCD. Both have excellent picture, but I can tell a difference in the clarity and color depth between the two...the Samsung's picture is better in this respect.