Wet feet are an eventuality, either from water getting in or sweat soaking your socks.  We try to mitigate, but you'll eventually find water that tops your boots.  Warm feet are as much a factor of your socks as your boots.  Winter is a different story.

The taller the boot, the bigger the risk if water can flow in.  I think fishing wader style boots could be a big risk.  The ones I'm familiar with are baggy.  Maybe try swimming with them on in the warm summer water before risking a dump in cold spring freshet?

My wet boots are LLBean 16" Maine Hunting Shoe.  They are not 100% waterproof.  The seams need to be treated annually.  They still leak a little even when treated, but no more than I sweat.  For getting in/out of the canoe they're great.  For the price and the ability to have a dry pair of camp shoes, I'm happy with them.  Not as slick as what I've heard about Chotas.