Ok first off you have to buy a name brand (Sony,Samsung,Tosibia,ect) Vizio,Sanyo,Oliva, ect and ect are crap (trust me I know, I sell electrinics) ...
the 1080 p and 720 p means NOTHING !!! Why, because everything and I mean everything is broadcast in 720 p or less (most of it is in 480 i) So you will never need a 1080 p, unless you have a blue-ray DVD player...Even they on a 50 inch TV or less you will never notice the difference...
Presser return the TV and buy a Cheap Sony (an S series, V series or better) an S seires is really a Wal mart TV but its better than a damn Vizio TV...LOL !!! Honestly you need to just spend the extra money (cause you get what you pay for, its the truth with TV's) and get a name brand LCD or Plasma (Panasonic or Samsung's are best for plasma) And yes, Plasma TV's are overall better TV's than LCD's...
chris