I would personally lean more to the Torchmate machine myself if I only had those two to choose from. I say that mainly because I have seen some good customer support on this list from Torchmate, and I do not personally care for the PlasmaCam. I don't own either unit, though.
I will say that there are a number of other manufacturers out there that should not be ignored (DynaCnc,EZRouter,Dynatorch,etc), as they all make a very nice and very capable 4x4 machine as well.
Check with Mike from Torchmate on here, he has always seemed to be very helpful with any questions about Torchmates machines.