If you are on small lakes, or rivers, and do not intend to use it on a large body of water, that changes the scope of the search significantly IMHO. A deep V is not going to be a requirement. If you have family aboard and anticipate the need for a head, there are CCs out there with heads in the console but most of these are going to be 17 feet or more.
For skiing and tubing I would suggest 100 hp or more because you will most likely have other folks in the boat at the same time. Whalers are over priced in my opinion.
Think no wood in the hull, and none for trim. A Ttop will provide shade but could be a head banger. I looked around on Craigs List quite a while before I decided we would go with a new RIB because of our itinerary. I didn't want something that would be heavy as a tow. The killer came when the insurance went through the roof over 40 hp.
But I was looking at Makos, Sea Chasers, Sea Pros, and Scouts.