By the sounds of it, DH and Barb are the current best farmers (purely for the speed at which they can plow through easier acts). I tried out a different build
last night that was apparently optimised for Barb farming and it did quite well.
I think the main issue with this build is that it is highly dependant on a decent Crit Chance to work effectively and so I actually ended up dying on Act 1, which did not happen with my Rendy build. However, when it worked, it worked very well.
I am sure you can scour the forums for a similar DH farming build.
As for equipment, I am collecting some half decent gear together doing my runs and will not be spending any money just yet. I will either wait until the new patch comes out or until you come over before I go spending - and stick to farming for now. I have got just over 3.5m now
How you getting on with your DH?