If your dead set on having one with a built in compressor then I would certainly consider the Hypertherm They make excellent machines (they only make plasma cutters).
I just got the Powermax30 and it will cut 1/4 as good as this one will cut 1/8 and up to 1/2" slowly. Although it does not have a built in compressor, it will cut heavier metal which is more in the range of size of material I typically work with. The consumables on the Hypertherm are also supposed to be less expensive and last longer from what I was told.
Compare the specs for rate of cut speed through specific thicknesses of metals (i.e. 1/4" @ 22 IPM [inches per min]) The higher the IPM per thickness of metal as well as the duty cycle the better the machine which can usually translate to more $$$. As long as the machine fits the bill for your use. Just be sure not to get a machine that is too small for your needs or your money won't be wisely spent.
