Shawn, If you are going to weld aluminum handrail w/ the machine you need at least a 275 amp ac output. Made the mistake years back buying a smaller (225???) machine. Had to take a hit selling it for a bigger machine ( Tig 300/300). Years later( about 20) I have all lincoln 275's and up (4 machines). One other thing I have found is YOU DON'T need all the bells and whistles that they push on high end lincolns and millers. Some of the machines look like the cockpit controls in a 747 !!!!! Keep it simple, can use weldcraft 250 amp aircooled torch just get the head replacement, when the threads get galled inside ( usually about 6 months of 40 hr. use) change out !!!! Also the fingertip control for current control (no pedal). Have welded alot of AL handrail and this seems to be the best set-up, even now w/ employees.
Best prices I have found are on the internet welding supply places, unfortunately weld suppliers can't/won't compete with them!!!!!