Which Mig welder to buy?

I have 110 or 220 in my shop now. I've used and old but good Airco stick welder for many years but decided on making the leap to a mig. A friend of mine uses a 140 Hobart machine and swears this is all I need and that the 110 makes it more versatile to use in different locations. I know he does a lot of fab work with his. I mainley use a welder to repair trailers, exhaust work and other hobby type applications.