I purchased a new 212 a year ago last month. For the type of watersports you describe, it will do a great job for you. Mine runs the speed you describe and is very comfortable. The boat handles well and is dry. Lots of storage space and room for 6 without falling all over each other. Baja does a nice job putting the boat together from what I have seen crawling all over it.
I have the same type trailer you will get and it does a great job. Easy to load/unload. I pull mine with an Excursion V-10.
Last summer I borrowed a 21' prop and the hole shot was stronger. But the 23' does well and am confident the folks setting these up know a ton more than I do about those issues. It is nice to have a little more "pop" when you are pulling a heavy skier but I don't know how much the 21" will knock the top end down.
We boat alot at LOTO and avoid the rush hour to the party cove as the water is big. As mentioned by others, the 212 is not a huge boat but I feel safe in it with my family. It is a very easy boat to drive and you will be surprised when you are going down the lake and the speedo says 65 MPH and the ride is smooth and effortless. (GPS who knows ??)
By the way I had thru-hull exhaust installed (paid $1500) and enjoy the sound though not sure if it does anything for the speed. Mine was a new 2000 equipped same as yours and paid $27,000.00 NOT including the Capt-call exhaust.
My dealer was not the best to deal with (St. Louis area). I had the exhaust installed at another outstanding Baja dealer in Morris IL. If I was a dealer selling a 212 I would know in the back of my mind I want to do all I could to make sure this person comes back when its time to buy the next size up.
Probably telling you more than you need to know but I want you to know I am 100% happy with my 212. No regrets whatsoever.