George,
Sorry I'm a little late to the party, but I think you made a good decision. When I was looking for a 37" flat panel, of course I looked at the Vizio at Costco. I simply could not buy it because of the obvious color issue it exhibited. I've also seen the other sizes of Vizio LCD displays, and they looked fine. However the 37" unit had a very obvious yellow tone to the color. I visited a couple of different Costcos, and also saw it at a couple of other store, and they all had the same issue. I also read a reference to this issue over at AVSforum.
Please note that I'm talking about the 37" Vizio from about a year ago. The current model may haved resolved the issue.
BTW, at that time I ended up with the 37" Viewsonic and I've been very happy with it. Today the 37" Viewsonic sells for $799 at MicroCenter. The styling of the Viewsonic is not as good as the Vizio (IMHO), however the picture quality was better.
Enjoy,
TIC