It's a beast with the 425's. Top end around 54 w/ bottom paint. It gets around 1.0 pretty consistently from 34-39mpg cruise. Will get 1.2-1.3 at 30-31. It's been a great boat for me so far. I haven't been in a sea she hasn't handled with aplomb. Sharp handling and a soft ride. The 425's give it more weight in the transom, so I have not experienced any of the following sea handling issues described with the early 330's. I'll take the family on crossings to ACK on days that I wouldn't fish with my buddies in my old 25' cc.