A common problem that I have come across when buying premium denim jeans is that they are often too long. You cannot simply have them taken up without ruining the vintage look that you have just paid top dollar for.
Here is an interesting article on the subject from the New York Times (login required USERNAME: spamcop PASSWORD: spamcop).
I recommend finding a tailor that can shorten your jeans and then reattached the original hem with an invisible seam. Don’t ask me how they do it, but you cannot tell the jeans have been shortened.