Depends on what character and how you want to play your character.

I've seen a live stream of a Barb with 1k all resistance and about 13k DPS.
He dies every once in a while to hard elites, but he is able to farm and kill most elites with the help of super saiyan mode (Berserk IINM).

Also, there's some who completely went all out on DPS. For DH and WD, chances are, they'll easily get one shot/two shot most of the time. So they trade off all res and VIT for the glass cannon build.

So.. yeah, I agree that you need a balance in terms of stats. But before pumping everything into all res, I reckon you take a step back and think about how you're gonna play, how your skills will 'synergize' with your items and play style.

This post has been edited by markypcs: May 29 2012, 01:37 PM