[Dan]

I know there are some really good splash jackets out there, but you might consider a waterproof shell (aka windbreaker). One advantage I've found is that they layer really well, usually have tons of venting options, pockets and compress really well. Also, high end brands like Mountain Hardware and Patagonia will replace any faulty item -- no questions asked.

This coupled with waders and a layer underneath is a solid way to go.