Start with size and how much you are willing to spend. The large Sony or Sharp aquos LCD's, I think still the only two makers of large ones so far, are going to cost you $5K to $6K. So if size is a factor and you don't want to spend that amount then you are looking at Plasma or DLP. For me if I were to buy one in the $2K to $3K range right now I'd probably get the Mitsubishi Diamond series DLP. DLP's are not that bulky. The 65" is 15 inches deep and weighs 75 pounds. But, if you have the room, what I would really do is watch craigs list for an older Mitsubishi rear projection which can be had for a song. Yeah it's 1080I but you WILL NOT be able to tell the difference and you'll see a lot better picture than most of the sets in the store. If you can find one that has the convergence issue you can probably get it for free and it's a very cheap easy fix for a brand new picture.
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"You learn more from losing than you do from winning." Lou Pinella