burn in shouldn't be your main worry for plasma...it's more the gas life (perverts), hehe. Then the burn in. Burn is minor unless you are one of those odd people who will have a single static image on the screen all night.
Rich pot heads usually have to worry about it, you know...do some hits, while watching a movie...then the movie is over and still sitting there...then pass out. lol
http://www.olevia.com/jsp/products/specs.jsp?pid=742i
high end of your price range...BUT wait 6-10 months and it'll fall into place
