my 12 years old sony tv had heart attack last night! there's no picture on the screen only sound came out. i think it's the picture tubing. instead of fixing it i think i'm getting new tv. went to walmart today and i was looking at the 32" philip and samsung. my question are: the higher the contrast ratio # does that mean the picture will better? what are the spec i need to look for when buying flat screen other than brand name?