IMO correct on both points. I use the 'free' HDMI cables that came with my Oppo and JVC TV in both cases.I wouldn't pay more than £2 for a 1m HDMI cable and no more than a fiver for a 3m one. It's digital, so as long as the cable doesn't fall apart and it complies to the HDMI specs, it will work fine.
EDIT: Wait, this is a really old thread isn't it and he probably has an HDMI cable by now.
Cooky, here is a newer thread all about the Denon DM38: http://www.avforums.com/forums/hi-fi-systems-separates/1278872-denon-dm38dab-any-questions.html
They seem pretty damn good.
Just a bit and i would of thought so too .EDIT: Wait, this is a really old thread isn't it and he probably has an HDMI cable by now.