Egh, I may as well add to this list.. Some already mentioned. The wheelbarrel gas air compressor has treated me pretty good. I had to change a carb on it, but that's the gas's fault, not the compressor. It runs strong, and it produces enough air to use a spray gun away from electricity. I also use it with my nailers when I'm around the farm (I mounted it to a pallet, that was a stroke of genius! It's heavy, but I just pick it up with the tractor and put it wherever I need it).
I recently bought the plate compactor, that works pretty well. Sounds a little like it's breaking itself, but I think that's just how it sounds. You need to drill a hole in it to be able to grease one of the fittings. Gotta love it!
I have their SDS Max rotary hammer. That's a great tool. It's also expensive. The SDS max chisels I got there are good too, I have to use it to bang a pin out of a backhoe, steel on steel, just banging away for close to an hour. The pin didn't look so good, but the chisel was fine.
Also, another tool I really like, the portable bandsaw is great. I thought it would be a one time use tool, but I find all kinds of things I use that for (just used it to cut about 25 10' rebars into 2' sections, sure, my sawzall could have done it, but man, the bandsaw is SO much nicer). The Bauer tools have been consistently good for me.