I think the Blackhawks road jersey is overrated. It's still a lot better than most teams, but where is the color balance? Their red jerseys are some of the most vibrant in sports, but the roads are mostly black and very drab looking. Switch the black and red and it would be a winner.
I think the Rams look best with either all-blue or all-white. The white-over-gold look just looks too pale to me, and the blue-over-gold isn't bad but isn't as good as the monochrome blue.
The Broncos' uniform design is a modern classic. It is clearly modern, yet isn't over the top like Seattle. I also think Broncos' and Titans' style helmet stripes look good and make for a nice break from traditional straight stripes. EDIT: I would also consider Bengals' jerseys sans contrasting side-panels and with orange as the primary color to be modern classics.