I have a Harbor Freight Fortress 2 gallon for exactly the same purpose and it is great. Gets to 135 psi quickly, is super quiet, and small and light enough to easily move around. I also take it to the dunes in my trailer.
Are they the 5.5" wide front wheels? I am definitely interested. Those look like the 2" backspacing rears, which I have on my car. They are excellent for clearing shocks, brakes, arms, etc.
I am looking for a pair of DWT 155-41 15x5.5 billet center competition beadlock wheels, see them here:
http://dwtracing.com/product/billet-center-competition-beadlock-buggy-sand-sandbuggy-sandrail-dunes-aluminum-lightweight-dwt-douglas-wheel-rim/
I have the matching rears and also new front tires, and I would buy new front wheels but everyone has been out of stock since last year so I am hoping that maybe someone has some (new or used).