I just got a new vizio hdtv it's 120hz 1080p with 100000 to 1 contrast ratio, the hdmi cable I'm currently using is cheap it cost like $4.00 on ebay, I'm thinking of investing in the Monster cable ultra 1000 hdmi cable it's like $50.00 bucks will this make a difference?
Is the 'el cheapo' cable HDMI 1.3 version? If so, then you should be able to play BD movies no sweat. For example I bought 4 Mediabridge HDMI cables from Amazon.com when setting up my home theater, most expensive was a 15' cable for $12, and they work flawlessly at 1080P.
Monster cable is way overpriced for what you get - realistically it should be priced maybe $5 more than the cheapo cable, not 10x more expensive. After all, these are digital signals so don't let the salesman babblespeak about 'signal degradation', yadda-yadda.