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I've had a Millermatic for 5 years without a single problem. It works beautifully, makes me think I know how to weld.
I think bigger is better you never know what you will need in the future. I have had a miller matic 200 for 25 years if I had bought something smaller I would have had to upgrade . just my two cents
I recently bought a Millermatic 180 and my welding skills improved 100 percent overnight.I had a small 110 volt before but found I needed more as my projects grow. Get the bigger 220 volt unit and you will have all you ever need for now and future projects!