I'm still slowly going through D3 with my Demon Hunter. I'm in Act III and am about level 30. Here's the build I'm currently using:
Hungering Shot (Cinder Arrow)
Multishot (Fire At Will)
Caltrops (Hooked Spines)
Vault (Action Shot)
Smoke Screen (Lingering Fog)
Companion (Bat Companion)
Passives: Steady Aim, Cull the Weak, Archery
It does a pretty good job so far, I think. Hungering Shot for single-target and building Hatred. Multishot for AoE. Caltrops, Vault and Smokescreen for kiting and defensive play. The Bat Companion to build extra Hatred. And the passives are just damage increases.
In Normal Mode, the only thing I've really died to is the boss of Act II. It took me three tries to kill it.
I've also started a Hardcore Barbarian, and took him to level 10 before I stopped playing him. I'll write more about him tomorrow.