I am seriously considering upgrading welders.I have a Millermatic 135, 115volt welder now. Its been a good one,but I am welding thicker metal now,and could use more capacity. I priced the Millers 212 and 252 locally for 1675.00 and 2250.00 respectively. Will the 212 be good enough or should I bite the bullet ,spend the extra 400 or so for the 252? The Hobart ironman 230 is 1600.00 at tractor supply. Is this a good machine? I guess I need some experienced real world input....thanks!