Do you need it to be portable or in that size? I recently did a lot of research to choose a new compressor, and was looking at the Garage Mate and everything else I could find in that size. The GarageMate is nice, but surprisingly the Chicago Pneumatic and BelAir (same compressor, different branding) also get good reviews.
I'd still go with the Garage Mate if only due to IR's support network.
Given my experiences at that CFM, I decided to bump up to a 60-gallon single-stage vertical stationary for not much more money (IR SS3L3). $600 at Northern, free shipping (freight, liftgate is another $85). Of course I still had to buy a regulator and filter; I went with a Milton.
To make mine movable, I built a rolling platform for it (I'm moving in March, so it made little sense to bolt it down). Also makes it easier to get to the tank drain. Since I'm still waiting for the compressor to arrive, I don't know how stable it will be. I will add heavy-duty levellers on each side if necessary. Platform is 3/4" birch plywood sandwiched to 3/4" oak plywood (wood glue and twenty eight #12 x 1.25" screws). Cutting the 4.5" hole through two 3/4" pieces of hardwood plywood with a hole saw on the end of my 1/2" drill (with no clutch) tested my mettle a bit. The only hole saw in this size I could find locally was a Milwaukee 6 TPI. Clench teeth, hold on tight, and hope the workbench doesn't spin!
I still have my old Craftsman 33-gallon oil-free horizontal for portable work (120V but draws 15A at startup). Loud as heck, but it still works after 12 years of heavy use. Needs a new pressure switch, which is on the way.
It will still take 2 people to move it in March; no way I'd stand on a Ryder liftgate with it and try to operate the lift switch and keep the compressor stable at the same time.
