I was actually looking at replacing my 52" LCD with a 72" DLP. You get a LOT more size and features (3D ready, 120-240hz, better picture, etc) for a fraction of the cost of a smaller comp. Sure it's 18" wide... but depending on your setup, doesn't really matter.
One I was looking at:
Mitsubishi WD73638 73 3D Ready Home Cinema DLP TV - 1080p, 1920x1080, 16:9, 3 HDMI at TigerDirect.com
Yep I've got my eye on it too, dell has it for $1600 btw.