Thanks for the input and I'm sure you are correct about the upgrade bug. The Yamaha is 5.1 DD with DTS capability. I was curious as to whether the 6.1 upgrade would make any difference. When I bought the system, I got the idea that the Center Channel was my weakest component but that may not be true.
The television is probably my next purchase. I've been waiting for the prices to go down some. Unfortunately, the only dealers in my area are Best Buy and Circuit city. I'm afraid to order a TV over the internet.
Again, thanks for your input.