so what's the difference between the 400, 800 and 1000 ultra hdmi monster cables?

[yungl1nk]

this is just a short background so just bear with me

so me and my mom were at circuit city and we saw this tv that looked amazing. it was on full display, hooked up to a bluray player, hdmi connection(of unknown brand) and it had potc:at world's end o playin(no crappy demo disc). I couldnt believe my eyes, the picture was so clear i thought i could touch johnny depp(and im not exagerratin). this is the tv: http://www.circuitcity.com/ssm/Panas...oductDetail.do

so we bought it, but wen we got home it didnt looked nearly as good as at the store. we even rearranged our living room cuz we heard that the further away u are from the tv the better it looks. but we think it may be our hdmi cable. we have a basic RCA hdmi cable and we r thinkin about gettin a new one. and we came across MONSTER hdmi cables but they had a 400hd, 800hd, and 1000hd ultra versions and we were wonderin wats the difference and is it worth. would rly appreciate the help. thanks

EDIT: this is our tv: http://www.circuitcity.com/ssm/Panas...oductDetail.do
no diff just 1080 instead of 720