I was looking over the Duelist and I'm a fan of it. Typically, the most common use for Bards and Rogues since it works well for their light armor. Fighters also might work, but you sacrifice some of your armor proficiency and I don't see any archetypes which particularly stand out.
However, I'm a fan of the Barbarian and the Urban Barbarian has a few unique twists. Their rage leaves them with no AC penalty and can be used to jack Dex and make it One Stat to Rule Them All.
Any suggestions for feats and rage powers that would help?