Welding rig question

Well I am in the same boat as you although I might have a little more welding experience, I have a Hobart stick welder but I need a Mig welder, to weld up my new exhaust, I have looked at the HF welders and talked to a few people, supposedly they are junk, BUT there is a fabo person on here can't remember who and he said he likes his HF welder, One thing i do know that to do alot of continous welding people reccomend a 220 volt welder, Millers, Hobarts etc. are over $500.00 for a 220 volt anyone else have any suggestions or input??