Michmom - you are going to want to move to Lake Country in Waukesha County. The schools there are wonderful. Target is there too for you. Oconomowoc is building a new outdoor mall with stores more in line with what you are used to. I moved here from Shelby Township. At first it was culture shock, everything seemed more cheap. Your Auto Insurance will be cut in half.
Lake Country does have some expensive housing but they for the most part are mid level income folks. It's all middle class to upper.
Look first to Pewaukee and Oconomowoc. Those are my favorites in Lake Country, look there first and then expand your search. I guarantee you this, you will LOVE it out there.
But there is no Mejiers any more.

You will find Pick-n-Save and Piggly Wiggly to be sufficent places to shop. You could go the route of Brookfield if you want to live with the Upper Crust, but I recomend the Lake Country Area above all.
Any questions... feel free. I still miss Detroit. Big time. Shelby Twp was a good home to us and we had family out on Harsens Island so the trip across Marine City Highway was a regular run, (26 Mile Rd) but once you begin to enjoy the new scenery in Wisconsin, you'll LOVE it. Do you have any Children?