Regarding the debate over wet suits, semi-dry, and baggy, I prefer the baggy. The others will keep you warm in the water and while riding, but for me it's more about how warm I am in the boat after my set. It sucks to be wet while in a boat doing 23 mph with a breeze when it's in the low 50's outside.
Get a good baggy suit that doesn't leak and be dry when you get back in the boat. Just layer your clothing underneath. If you take a digger and get some water up your sleeve you can peel off the layer that got a little damp and still be dry.