We use HDMI cables a lot at work. From a data transmission standpoint, the cheapo monoprice cables will work. But we did have some start to fail after about 400 mate/unmate cycles at a recent trade show.
If you want high quality, I recommend DVI Gear:
http://www2.dvigear.com/hdsuhirecoca.html
You won't find a better cable, and the price is not astronomical.
Gefen is great, too:
http://www.gefen.com/kvm/dcable.jsp?prod_id=5451
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