The Epic 18 and Seda Glider will be too stiff for him to turn (see his
comments about the Caribou). He's not looking for a fast boat, as much
as something faster than what he is paddling but will still do a quick
lean turn.

The NorthWest boats, specifically the Pursuit and Discover have decent
speed and a good lean turn. The Epic 18, Seda Glider and CD Extreme
will all walk away from the boats you have listed, but don't turn as
fast.