What sort of bad things have you heard about Gatorskins in the wet? I have not quite 3,000 miles on mine and they run just fine in the wet. Love 'em in the dry too.

My other bike has Bontrager Race Lite Hardcase. They seem fine wet or dry too.

As others have mentioned, in the wet, I watch out for paint, the vinyl strips they use instead of paint, metal plates and stuff, and generally brake and corner more conservatively.