Yes they have come down in price a lot recently. If your seriously interested then its a good idea to read up about their cons aswell as their pros. From the top of my head I can think of
Screen burn - i.e. logos on cable tv channels might get imprinted on the screen
convergence - not sure if this is a problem once properly setup/calibrated. I do know that if you have to make sure the kids dont 'bang' the tv in case the convergence goes a bit out.
test where you will be sitting, RPTV's have to be at viewing height, if your seated higher or lower than the tv set then it looks a lot darker.
I believe the older RPTVS had a plastic front and the new RPTV's have a glass front - Ive heard good things about the glass fronted RPTVs giving a better picture overall.
Good idea to checkout the extra warranty for peace of mind, Ive heard that some parts in a RPTV which can go wrong after >12 months are very expensive - again make sure the warranty covers these types of parts.
Also I would post in the tv forum for RPTV owners to give you an overall opinion.
Personally I would get a 32" tv and a cheap lcd projector for watching dvds

but its not for everybody tastes