Oh there are quite a few good machines, I could probably name at least one from each of their lines, the US Prod. Solus is nice, the Mytee Speedster 1005DX , The KleenRite Edge too, I was just looking for a very balanced, very specific design when I approached Mytee to build my machine, it had to support truckmount tools, so big tanks, autofill, APO, and a BIG pressure pump were mandatory as well as a high cfm vacuum system...all on normal house amperage....oh and it had to be affordable, the idea of spending $5K on a portable seems nutso to me.