I just bought the Vizio to use as a computer monitor. The picture is quite good, but there is a TON of input lag. If you can manage to find a way to get into the service menu, you might be able to disable the image processing to fix that. If I set my desktop resolution to 1024x768, that's the only way I can eliminate the input lag completely.
I haven't been able to find a way to get into the service menu, so sorry I can't help you there. But I would recommend the TV highly for image quality. For just watching TV, this TV is proly the best you can find for the money. I got it for $430 brand new from Adorama, but I think they messed up when putting it into their system cause now it's $590. I GOT SO LUCKY! :P