The definitive HDTV buyer's guide?

So it appears that my technophobe mom is shopping for a new tee vee. She called me for advice on LCD vs. plasma and all that stuff, but when I got mine a couple of years ago, I decided right from the start that I didn't want to spend that kind of money. I got a Sony HD rear projection and I'm very happy with it, but I never really investigated the flat ones because of the price tag. Apparently though, she's going whole hog with it. I don't want her to be at the mercy of salespeople, but I don't really have the time to dig into AVS Forums and go panning for facts.

I know there were threads about this on the old EE, but I'm having trouble accessing the archives. Anybody care to take a few minutes to share their knowledge again? Or for that matter, even if you just have a link handy to a really detailed, objective buyer's guide whose conclusions you agree with, that would be great. It doesn't have to be non-technical, in fact I'd prefer that it have as many technical details as possible, so I'll be convinced. I can laymanize the info for her from there.

Thanks.