I am interested in the options also.
I just installed Vittoria Rubino Pro in 28 mm and while they ride better than Panaracer Pasela in 32mm width they do not have the same traction as Pasela in the wet. I should have taken a hint that the traction on Rubinos was not good when my rear tire was skipping while I was going uphill standing up on a 5-6% grade on last Sunday ride(wet road). When making a slight turn the rear tire lost traction and the bike just went under me and I crashed. A friend of mine was just ahead of me on the same turn and he was fine, he was on GP4000 in 25mm.
I commute on Paselas and never had traction problems in the wet like I did on new Rubinos. I also ride a cyclocross bike with Ritchy and Michelin Jet cyclocross tires in 30mm and I never had traction problems riding on wet pavement on that bike.
I went down before in the wet making a turn a few years back and it was on Vredestain Forteza SE in 23 mm.
I think it does depend on the compound of the tires, but I'd like to hear what others have to say.