We have the Honda 135 on our CD-25 and are very pleased with it. We went with that over the 150 on the recommendation of the factory (based on how we told them we'd be using the boat). No complaints with power... well, until you get to a high elevation like Lake Tahoe. :wink:
We find that we cruise in the mid-teens most of the time, and the 135 is quite happy there. With flatter water, we will run into the low 20s. On a couple occasions with very flat water, I've gotten 30 knots out of the boat. My opinion is that the boat gets "busy feeling" at those speeds. I'm sure more horse power would get you another couple knots, but it isn't something we'd use.
You pays your money, you gets your choice (as an old college professor used to say). Good luck with your decisions.
Best wishes,
Jim B.