Hmm, I've never seen those little hvlp compressor units before, looks interesting, curious to see if anyone has experience with those. Like ripthorn said, the CFM is the key. Smaller compressors typically have less CFM. A lot of the guns I've seen have somewhere around 6 or more, usually more, CFM, I mean take that much CFM to work properly, that's what you gotta look at, find a gun that doesn't use as many CFM's and a compressor that put's out more than the gun is supposed to use, always good to make sure you're not gonna have any problems. Also, like ripthorn said, stay away from harbor freight if you're lookin' for decent tools. I know people that use their spray guns and like them, but most of them just throw them away after the job. Also, I would recommend lookin' to make sure you can rebuild the gun, or have someone do it for you, if you plan on using it for a long. Something is bound to happen after a while.