Rob,
Surely others here know more about golf on Maui then I, but I immensely enjoyed Kapalua. I would say it is certainly worth the money.
As a side note, I didn't mind the Bay course either. I missed Makena, but have heard good things. Avoid Kaanapali if you can help it.
Most of all, enjoy the island, the scenery, and if you snorkel of scuba there is a beach a few miles down the road from Kapalua that is superb. You walk a mile or so through rainforest before you enter, and it is a special little beach, often with no people there. The locals can help you out with more exact details. Enjoy your time there, Maui is one of my favorite places on earth.
Cheers,
Jordan