Sorry for late response...haven't been checking BMW fanatics for Diablo chat lol
Monks and Barbarians are tanks, that's what there meant for. So don't expect heavy DPS. Most I've got out of my Monk is 18k dps, yes I know that is pathetic.
These 2 classes need resistance more then health in act 2 on wards. Its more important then health as little armor and resistance takes all that vitality away when attacked by blue/yellow mobs. I believe you need 600 + on res. The best part with monks is the one is all passive, so just stack on one resistance then spam all resistance with that passive.
On your weapons, you should get life on hit (though I prefer crit hit as I play solo some times and want higher damage)
My Friend is a barbar and his res is all +/- 1k. His damage sucks but he stays alive...which is what you need. Combined with some range heroes and your sorted.
My other friend (witch doctor) took out Diablo out by himself in inferno. We all had to congratulate him on that. Huge feat
Key to success is items from auction house = millions of gold
Get the gold from rare items found = magic find which should be +300% and luck
Hope this helps and i'm not to incorrect here