We have all. We have 2 46" Plasma by Dell. Neither are used daily or a LOT in case daughter and firends are on them during sleepovers, etc. Both were very expensive when we bought them over 5 yrs ago. The first one was around $3000. OF COURSE they are lower in price now.
We've had NO issue with the Dell Plasma tv's and NO complaints. Yes, they do get hot but we do not use them on a daily basis so our use cannot compare to someone using it on a daily basis.
Family area downstairs had 2 twin TV's (large family area) both are Sony Bravia and LOVE them. Each about 46" each, same room, fireplace separates them. Great set up for parties, etc. We use one for the DVR non stop, other for regular watching and on game days we have both blaring... FUN.