Re: Is O/B worse for skiing?
I frankly think an ouboard is BETTER than an I/O for skiing. But an Inboard is best.
If you ever go to waterski competition/ski shows, it is very very common to see them using boats with one, two, or even three 200 HP outboards or similar, usually pulling 12 man pyramids and such. IMO outboard ski boats would rank as not as good as an inboard, but better than an I/O for towing skiiers. They used to be extremely popular, but have seemingly fallen out of favor and out of production...in my opinion probably because wakeboarding has become so popular. The small outboard ski boats make beautiful flat wakes for slalom and ski shows, but just aren't heavy enough to make the huge rolling wakes everyone wants for today's wakeboarding craze. And inboards and I/O's seems to be more versitile and adjustable in that respect. And Inboards and I/O's are a WHOLE lot easier to fit with a nice big swim platform off the back...which is also a priority for many people. And like you said, they generally are quieter, though modern 4 stroke outboards are now closing in on that issue making it less of a concern than the old smoky 2 stroke screamers.
But there's absolutely nothing wrong with outboard ski boats for all the reasons you mention in your first post. Primary benefit in my mind is how simple they are to maintain. Cheaper and easier than an I/O or Inboard, especially when it comes to winterizing, etc. It's more the hull design which effects wake size and shape that you want to be concerned with, and align that with your goals.
But if you're just talking about occasional recreational skiing? Absolutely an outboard is an excellent choice. Depending on boat size, usually anything 120 hp and up on an 18 or 19 foot boat will have more than enough to power to get you up on. I learned to ski, and skiied for many years behind a 70 hp 2 stroke ouboard on a 16 foot Crestliner fishing boat which is still in the family...on 2 skis it pops me right out with ease, and at 195 pounds 20 years later I'm certain I can even still do deep water slalom starts behind it when propped for accelleration. But last time I did it on that boat I dragged for a LONG time. Definitely a 90 HP would have been better!
If you want an outboard for skiing, I personally see no reason at all not to buy one.