I bit the bullet again...
Well as I often do, I started out with small ambitions and ended-up on the high end. I bought a 52" Bravia XBR2 that was a left-over demo unit with (probably) several hundred hours on it. The set was spotless and dust-free, and that tells me it couldn't have been on display very long. I was headed to the 50" range ultimately, so I just ended up there sooner than I planned. I got this one for about $3,300 from a local small shop I have supported with my $$ over the years, compared with $3,800 at BB and elsewhere. They are also the only local authorized Sony service center, but for some reason they only service what they sell.
With LCDs, I actually prefer a set that has been "burned-in" a bit. I checked the display very carefully before I bought it and I could not see any defective or "stuck" pixels. In my experience, the "infant mortals" in LCDs often appear in the first several to 100 or so hours of use so I'm thinking if this one made it this far with no problems it will continue to be free of bad pixels for years to come. My 40" Bravia developed one "weak" pixel within the first 2 weeks (the green element won't give full brightness so that group looks reddish in a bright white scene), but otherwise it has been free of additional defects. Since for the most part bad pixels within reason are not considered cause for a replacement or warranty claim, I'm wanting to see any such problems appear immediately. I think (hope!) I'm now good to go with this set.
Anyway, as expected my wife is leaving it on for extended periods, so I'm keeping the brightness and backlight settings low when I'm not watching it.
So far, I think I made a good decision. I hope it ends up that way. Someday I'll clean-out my basement and turn it into a man cave with the projection system. For now this will have to do, even tho' it's measured at only a paltry 4.3 feet!
Thanks to all who commented...!