Unless you can find a slightly older chip, the only chip made for Lowrance today is the lake insight which now covers multiple states including MN. There is a Pro and HD version.
I think either would work for you, although if you have a high end unit the HD might give you a couple small extras.
I would opt for the Navionics Hotmaps Premium, it will have the most up to date map information, free updates or downloads for a year and more HD lakes.