I'm quite pleased with marathons (38's) in wet and dry. I really like the 420's but the pluses, not so much.
I was caught in a downpour in Syracuse with a loaded bike on 420's. The water was nearly up to the bottom bracket and flowing at a good clip. I was not concerned about traction, much more concerned about unseen potholes.
On the pluses, they wear like iron, great traction and no flats do far... But they're heavy and seem to have high rolling resistance. So they are what they say they are... I pump the plus on rear up to 90 and it rides faster...