I got wet at Chin too. It appeared to come from my neck and run all the way down to the crotch. I am not sure that there is anything to prevent that. At least not that isn't gonna strangle you. I think a good noreaster hat(big brim all around and bigger in back might help. But your neck has to be tight to help keep water out. And a good bib coverall with long jacket to help keep water going down your back. I was using my Columbia goretex jacket and a pair of Remington bibs(I think). Will try to refine my gear a bit.
I have tried quite a few quality as well as low end stuff and it can be hard to stay dry.
The problem with boating rain gear is it is coming at you horizontally as well as vertically and that presents more problems. You really have to be "buttoned" down.
I might try BP's 100mph bib and jacket next
