Hey Jim,
That's funny, I'm considering upping from my 130Amp Mig to something more powerful.
That was a used unit - right?
I'm actually thinking of just buying an Arc welder for really thick stuff. There's a local place with the Hobart Stickmate XL 235 AC/DC 160 on sale tomorrow for around $380.00 - this is the same unit as the Miller Thunderbolt so I figure it is pretty good and it seems more than capable for doing the thick stuff. I'm not planning on doing anything that is thick and pretty so I'm not sure I need more powerful mig.
Good find - you are the deal-meister!