Ours is a Pioneer Elite rear projection. We keep it because I haven't seen another tv that can match it yet. In the end the only projections that really looked amazing were Hitachi Diamond and Pioneer Elite. As things stand now with the Pioneer Kuro brand gone, the best panels are the Panasonics and somewhat less so the Samsungs. You can get a mid-fi model in the 50+" range for very little cash these days from a number of manufacturers. Oh and BTW the plasmas have now surpassed the LCD panels for overall quality though they use more power.
My advice is let it go. Those big ass sets are really getting dated, some devices are not compatible with the older HDMI connectors and you can get a reasonable panel for a reasonable price these days that has full compatibility and a long low power life ahead of it.
Check out LG, Samsung, Visio, SOny, Panasonic, and Mistubishi. It is not uncommon to see a Mistubishi 73" DLP for the $1000 range. Dave Snyder just picked one up over the holidays and is very happy with it. DLP is a fading technology but it beats the shit out of a rear projection chiropractic bill.
http://bensbargains.net/category/94/tvs-46-and-above