I own a willie and an Aire S.Puma. If it's hatchery season with sub zero temps, I have front and rear heat in the aluminum. The DB rows much nicer and is easy to track. This said, I still would rather fish with the Aire because I can take it into "nearly" any river and have confidence if I miss a stroke on the oars. The built in floor boards are nice for standing and casting. I can also dump it off the side of a hill much easier which is an advantage in so many circumstances. Three men can carry it fairly easy with clip on side handles.

I would think if your DB is older it might be worth keeping. You can find used inflatables at times for cheap. Just recently there was a Super Puma on line for $2500 I believe.