Do yourself a favor and do NOT buy either of those TVs. For a tight budget, do to Costco and buy the Panasonic 42" 720p Plasma for $450. I have this set in a bedroom and it's stunning, and you get Panasonic quality. I have it connected to Blu-Ray and PS3 and HD cable. Insignia is one of the Best Buy in-house brands and I think Westinghouse is the low-end model made by Philips (which is not good in themselves). By the way, that idiot at Best Buy is wrong about "most network programming is in 720p". Most is in 1080i. But don't use this as a reason to not buy a 720p set. In smaller screens, like a 42" or even a 46", 720p is fine.
I am finally making the move to a flat panel TV, I am comming from a CRT 1080i set. I am on a budget, and have it down to two choices. 1. $549 Insignia Plasma 720p with 2 yr waranty included 280Watts. or 2. $599 Westinghouse 46" LED-LCD 1080p 1 yr warranty 80 watts. The T.V. will go into a small living room where seating is directly in fron of screen about 6' - 7' away. The room is not in direct sunlight, and can be darkened easily with blinds. The sales person recommended the Plasma for best picture, warranty and high refresh rate. Sya that most network programming is in 720p. He stated that there would be slight reduction in sharpness when using BlueRay on the 720p. I am just a little worried about the reliability factor of the Westinghouse. The picture is nice on both, but the LED is superior. Please help me make the best choice for my use, and budget.