Hi,
This was an interesting article I was reading in the Sydney Morning Herald regarding purchasing "high performance" HDMI cables with new plasma and LCD tvs'.
I personally have a $30 HDMI and have no problems with PQ.
http://www.smh.com.au/news/digital-life/home-entertainment/articles/would-sir-like-a-200-cable-with-his-new-tv/2008/11/13/1226318809887.html