I use a typhoon Alpha for paddling, used to have latex socks but changed them for ankle seals and good boots.
Is it aS heavy duty as my Polar Bears diving or rescue dry suit? Not a chance but does it keep me dry when worn, yep. Will it last as long? Nope but a around £100 who cares. It's lightweight enough that I can do what I want in the kayak without getting too over heated though.
Have you thought of a better winter wetsuit as this may do what you want? I dive in an O3 and there are loads of winter surfing ones that are great in the cold.
We've a few for sale in the dive club if you think this may be an option.