I went through the same decision process. I really liked the digital welders, but I needed a pilot arc plasma to replace my MOSFET cheapo, and the 255EXT was way out of my budget. When I bought the MOSFET unit (LOTOS), it was without enough knowloedge to realize the Pilot arc is needed to cust expanded metal. I'll keep it for sheet metal and Aluminum Plate, until I talk my friend into buying it from me.
My typical work will take me up to 3/8 in Aluminum and Steel. Your .75" is pretty thick evenfor the 250 or 256, unless it is steel, you can do multipass welds with Stick, or TIG. The 256 has th same output as the 250, is a little quieter, and duty cycle at 200amps is 60%. Most of my welding is around 150amps and the TIG duty cycle there is 100%. The cost differential for getting the 60 amp Plasma was only a fraction of what a stand alone Plasma would be. Changeover is not that bad, as I have a 3 way ball valve to switch input from compressed air to Argon, and switching the torch takes about 15 seconds.
Shipping damage applies to all machines, mine arrived in perfect condition. As for the torch, it came with a euro style water cooled, but since I will be using it mostly below 200amps, will wait on the Everlast water cooler, and just use a garden hose connection with the output to a sprinkler or the few times I need to push it (not an ideal long term solution, as the tap water has minerals, and will eventually corrode the internals, also the proper fluid for the coolers has Glycol and De-Ionized water, so it does not readily conduct electricity if there is a leak at the wrong point. - Guess I am talking myself into a cooler sooner, rather than later
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I don't like standard Euro style torch, and strongly recommend the CK with the superflex cable.
Everlast PowerPro 256 (2013)
Northern Hybrid 200 & ST80i
HF 90Amp FluxCore (Don't laugh, it is what got me started)
Lotos LT5000D Plasma
HF 4x6 Horizontal Bandsaw
Rikon 18" Bandsaw w/VFD
Delta 14" Drill Press
Robland NLX31 Euro Combo WW