I have the ironman Flo Pro Max
Ironman 4x4 Compressor
real fast at pumping up a 33" tyre. Knocks over the first 2 tyres from 16 psi to 40 psi in about a minute each. Slows a little for the 3rd and 4th tyre. It is a large and solid unit. It has so far withstood being jammed up under the false floor in the back of the defender over many bumpy tracks. I'd buy another and comfortable to recommend it to anyone. Ebay has them for $242 + postage. I think i paid around $200 if you have time to wait for a bargain.
Whatever you buy, buy quality so you only pay once.
cheers MLD