Frozen Furit Sorbet goes pretty well with Ice Wine. We've had that at a few nice places out and enjoyed it. As you said though, nothing too sweet (or too sour either). Something like a peach or mellon type is good.
For the Ice Wine itself, my personal favorite of the five or six I've tried is Ehrenfelser Icewine from Grey Monk. They describe it better than I can here:
http://www.graymonk.com/WinePortfolio.php?art=77
Beyond that, as far as choosing one, another good bet is to visit one of the better wine stores in town and ask for their recommendation. I've had that work out very well when expanding my wine experience in the past.
Hope the meal goes well.
