Snap On is the only quality brand that makes the 30 and 60 degree angle heads. They are pretty sweet.
V8 Tools is the only one I know of for sure that copies the 30 and 60 degree head. The V8 Tools are Chinese wrenches, and I do not know the quality of them. I was going to purchase a set of the V8s to give a shot a couple of weeks ago but I could not find the 14pc SAE ones in stock anywhere. Metrics, yes, but not SAE, which is what I wanted for hydraulic lines.
I would up going with a set by Tekton that is 60 and 15 on the angled heads. They are cheap Chinese wrenches but are surprisingly nice for what are supposed to be cheap junk tools. I got a set for $44 and use them at work all the time for hydraulic fittings. The finish is pretty decent and they don't have humongous lobster claws. It seems many of these cheap tool makers rebrand the same sets, I've seen Sunex, ATD, and Tekton wrench sets that seem to be fairly identical.
You may also want to pick up a set of cheap Pump or Service wrenches for the 30 degree heads.
http://www.harborfreight.com/15-piece-metric-service-wrench-set-93668.html