If I had my own garage I would pick up:
http://www.millerwelds.com/products/mig/millermatic_350_350p/
And:
http://www.millerwelds.com/products/tig/dynasty_350/
I'd probably buy the TIG first as it's what I actually like to do, but a MIG is what a guy actually makes money with. I'd like to work a full time job and be able to do projects on the side for people.