I've got a Dynex 42" LCD 1080p.
So far, it's been great. The only complaints I have relate to peripherals... but I have an unorthodox setup in my living room. I bought it back in summer 2008 for $1000 at Best Buy. The Sony, LG, JVC, Mitsubishi and other comparable models all cost at least 60% more than the Dynex.
I run mine @ 1920 x 1080 as a computer monitor for my ATI video tuner card as a DVR over 15-pin DSUB VGA, and then have a Samsung Blu-Ray player on HDMI as well.
Unless you get the new 120Hz technology, the money you spend is more related to glass size than resolution, IMO. 720's and 1080's at 60Hz seem to cost just about the same, give or take about $100.
I think the Dynex and Vizio products are great values, aside from the outflow of money to China. But, it's either going to China, Mexico, Indonesia or South Korea... none of these are built in the US.