I can't really picture your setup here, but as for the TV, Mitsubishi makes a 46" Platinum series RPTV. Not too expensive ($2000-3000 depending on the dealer). If you're looking to put the TV over something why not look at flatpanels? I think the prices are only slightly more than your 5K range.
Tabletop Rear Projection 16:9HDTV Over Fireplace
I'm looking for a rear projection 16:9 HDTV 42-72 inches diagonal. I need to put it over a short fireplace insert so I can't use one with a full base. I'm hoping to keep it in the $5k range. I don't wish to control the light for daytime viewing and I'm not too into fan noise so front projection and plasma seem out of the picture (eh hem, sorry) for the time being. Thanks to anyone who can help.