low amp mig and auto shield helmet

If I buy the portamig low amp welder would an auto darkening helmet work at 15/20 amps if it would what one is recomended if not, what would I go for

If your going for a Portamig from Weldequip, he will be able to supply you with a suitable lid.
Failing that, DIYWelding is also a forum member and can supply this, which is claimed to be stable at 5amps (never tried one myself, so this is not a product recommendation). I have dealt with DIY and Weldequip and have had very good service from both.