It's not an awful deal at all, but remember you are dealing with a company that usually only deals with Best Buy. Westinghouse is a Best Buy brand and is somewhat unknown. The specs look terrific though so it's difficult. I bought an Olevia 2 years ago thinking that the off brand didn't matter to me. I absolutely love my TV but the company filed for bankruptcy recently and now I don't know if I'll have any support if anything happens. Keep that in mind, especially during this economy. You're going to start seeing MANY unknown companies go out of business and Westinghouse fits that description perfectly.
If you NEED an HDTV right now, I say go for it. If you can wait about a month or two when the giant retail stores put things on sale for the holidays, then do that. It's going to be a bad time for retail this year and I'm betting that things like electronics will be discounted heavily.