Granite Peak is the closest you can come to a real skiing experience in Wisconsin. The top half of the mountain is steep and the bottom half has gladed options in many places. The skier's right side of the hill is all black diamond and rarely crowded. The terrain parks hold my kids interest. Th high speed 6 moves a lift line quickly.
The food is expensive and bad, but they dont mind you bringing your own.
If the skiing is #1,2 and 3 on your list(as it is for my family) Granite is the obvious choice.