I currently own this Sony Vega (It's Vega BTW, the extra 'V' is just a shadow of the first V), it's a 2004 720P 3 LCD rear projection TV:

I bought it new in 04'. When it works it's a fantastic TV, even the motion blur is minimal for being a 60hz 6 year-old TV. However, there were known problems with this TV which included the light-engine block (which contained the 3 LCDs and the fan housing) from overheating and causing streaks of color across a corner of the screen. My TV suffered this problem a little over a year ago; luckily the TV was under an extended 4-year warranty from Best Buy. Thus, BB replaced the entire system ($1200 replacement part / service) for free. Then, about July of this year the backlight (which is user replaceable) broke and cost me about $160 to replace.
As I stated in the 3D TV thread, I was browsing Sony's new offerings at my local Sony Style store and the sales person mentioned some of the problems they had with the newer flat-panel LCD's. Whilst I think Sony's are great WHEN they work, I think the speed in which new TV technology is introduced leads me to advice that regardless which brand of TV you purchase, you should get the most comprehensive extended warranty you can get. And see if they can have it kick in after the 1 year manufacturers warranty has elapsed.