Looks good Adam. The only thing that sort of stood out to me was the "H" in graphics. For some reason, when i first look at the word, the "H" looks like a "K". I think it's the placement of the effect and the darkness of it that distorts the H just a little too much. But, it could just be me! I stare at business cards every day, as I cut down around 5-10 orders a day, and little things tend to stand out to me more than they would to others...
Make sure that whoever prints them for you adjusts their digital output to pick up the background graphic. It's a tough one to get the full affect on if they don't tweak their output a little. Also depends on the box they're using.
The die cutting idea would be cool, but you are right... for the amount you use, it could get costly. The die is a one-time fee, but most shops that I deal with charge anywhere from $60 - $150 to die cut cards with an existing die... just depends on quantity.
They would look cool printed on clear Lexan with a white flood on the back to highlight the mountains...