Hi

I have a Snapon 160 mig and it is much more than any diy'er really needs but then again I do also restore Landrovers aswell

You probably only need about a 100 amp but i always use too much power ( I like over kill ).

Your local welding supplier should be able to give some good advice but don't always take this as gospel.

Also try Snapon and Mactools. People tend to stay away from them because they are expensive but I find them Quite reasonable and the quality is excetional!!!!!!!!!!!!!

Good luck

Andy