I've used Monster cables many times and to be honest they are over priced. Most of their cables do have a lifetime guarantee, but I've personally returned at least 5 Monster video cables in my life and didn't notice a big difference in video quality.
I've heard of some issues with cables 2 go hdmi cables as well. I would try a site that I use all the time www.cyberxlink.com, they have HDMI cables for around $24 and the quality is as good if not better than most on the market.