I have a few tvs throughout the house, but I have to say I really like my Mitsubushi DLP I have a diamond series aswell... The picture is flawless, and has been a great TV, especially for the money, though I bought mine when they were a bit more expensive, they have really come down in price....
I have done a few side by side comparisons and the dlp always catches my eye more so than the others... but not to say others may like something else... I think dlp is frowned upon by alot simply because it isn't "slim" and you can't hang it on the wall... and i think alot of people see a 3000+ lcd and automatically assume the dlp is junk because it is big like older projection units and doesn't cost as much as the lcd's... Even though my dlp is 73" it is super light
I had an LG that completely crapped out on me... Had green pixels on the screen right out of the box, took it back, got another, same thing... took it back, they basically told me to deal with it as a certain % of bad pixels is expected... Ended up getting a samsung instead, has worked great since...
A buddy of mine just got like a 80" sharp aquos or whatever the heck it is called flat screen... and we weren't impressed at all, really bad picture quality for the $$ IMO, he took it back and got a DLP like mine, loves it.... Though I should add he really only plays games and watches movies, and he may have just calibrated it wrong or not at all, but it would skip and blur with almost every game and the movies didn't look any different than any of the other comparable high end tv's.