Some advice I can give you ( it may not be good advice

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Try and keep it as short in height as possible. The Sony stand that is $599 is about 18" high; that will make your TV height pretty high. I had a friend of mine build me one, that stands about 14", and believe me I can't imagine the GWII 60 inch being much higher.
Now for the bad news!!!!! All stands that I have seen, including the 800 dollar Bello's are 18". The stand UMR is showing is really pretty too, but I noticed it is 22" high.
Lots of people really like the Ikea stands, if you go to their website, it is under >Storage furniture, then TV-Hifi.
One person mentioned sitting on your couch/chair or wherever you watch TV and measure where your Eyes are from the floor. I think for most people it's around 37-41" off the ground. The center of the GWII 60" is 27.5 " from the base. So if you add an 18" stand to that, now you have 18+27.5=45.5" which means the center of the GWII 60's sweet spot is slightly higher. I guess you get the point.
Good luck, the TV is pretty nice. I actually watch my first real show today in HD and I was very impressed.