Sea Ray

The difference in speed between your engine you chose and the upgrade is minimal except for the price difference, if for some reason and I doubt it you want a quicker “hole shot” simply have a separate prop for the days you are skiing, this would be the most economical route including fuel consumption however I doubt you will need to do this either. Good luck with your new toy!

God decision on the boat. You'll be fine. For those days skiing, have fewer people onboard and no issues. If you want to get skiers out of the water easier with your current hp, explore Insanity Pylons. It's a portable pylon that makes a huge difference on the angle of the tow rope.
I use one an a 23' SR bowrider and it makes a huge difference - especially for us who have chronological assets!
Have a blast.

Agree with what has been said. Should be enough for what you want to do. Have fun with that boat!