"GET THE HD"
That is the big thing, really. I know so many folks that have dropped the big bucks for an HD monitor, but then fail to get an HD programming package to support it. You hear them saying "Really, I can't tell the difference!". It's such a waste.
VIZIO? As Mr. Blues says, they are usually rated as "pretty good". I like SONY for TV, and also like the looks of some of the Panasonic stuff I've seen. But it's personal preference, so you have to do your research and look at them in person without sales pressure. Check Consumer Reports, they have unbiased ratings.
But get the HD!
Dave