You can get an NEC pg6 or pg9 series crt front projector for $1500-$2000. They are hdtv capable and will do 80 inches easily.

Here's one with slight wear on the tubes, of course you want to find one with virgin tubes.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1499&item=1942623058

Alan
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