i just bought this TV yesterday and got it hooked up to cable today but the picture isn't clear at all...I'm wondering should I have bought a better Tv for 50 bucks more? OR do I need to adjust the contrast, sharpness and all that ( I havent done that yet) The box says it has 1080p (don't know what that means...and it has a number but I don't know what it means 4000.1 and I've seen other tv's that have this number as high as 100,000.1 what is that number and what does that mean? does the higher number, mean a better picture?