I had a plasma that lasted 18 months. So I would'nt recommend them.
But we did get insurance, and once the engineer failed to fix it, they offered us another plasma. Which we were a bit weary of, so we put the extra money up, and got this puppy:
http://www.comet.co.uk/comet/html/cache/648_231134.html Which is cheaper on this site, good luck.