I saw one on sale at walmart for 549.00, is this a good enough t.v? Im just going to use it for watching my movies on regular d.v.d, I have a old school 19 inch t.v right now, how is the quality, and should I instead get a panasonic viera 42" plama, what would be better quality, Im viewing the t.v in dark entertainment room, about 12-14 feet away