Pat,
All I can tell you is how I feel having gone thru upgrading the Honda 150 to a Yamaha 200 on your sister baot (was named Anna Leigh).
As you know, my Honda 150 blew up and was totaled. However, the lower end still functioned, and I had 2 SS props. I am happy as hell to have the 200.....yes, it cost me a lot of money, but I am 100% convinced that a CD25 cruiser runs best with 200 horses compared to 150 (exception might be a very lighted loaded 25). Note this statement can only be made in the last few years once the lighter weight 200s became available. My 200 only weighs 4 pounds more than the 150 did. So I've never looked back, and feel very good about having done it.
Of course I had no choice, so that made it an easy decision. I also recommend that you do the switch now for another reason. The only thing I still feel bad about is that I had to junk that lower end. I still own those props which is completely non-productive. I tried to sell that stuff, but was unsuccessful. Finally the boat yard told me to "get that s**t out of here"; so it went to the junk yard. I would have felt much better had those servicable units been useful to someone (for any price). My assumption is that it will be far easier to sell a working outboard than pieces regardless of engine hours.