I'm actually about to graduate with my BS in accounting from DU. I'm going elsewhere for my MAcc, but it's not in any way due to the school's academic reputation. In fact, I have already secured an offer from a Big 4 firm for when I finish my grad degree.
Regionally, DU has a great reputation, and the recruiters favor it over other programs (The only exception being BYU, which the Denver firms also recruit out of). I know of classmates who secured full-time offers with Big 4 firms in big cities as well, such as NY, LA and Houston. If what you want to do is Big 4/Public Accounting, DU will get your foot in the door.