Flat water flip ski requirements.

I'm looking to possibly get into a flat water flip ski. What are the minimum to mid requirements? I had tons of riding time in my 20's on a decently built 550. Milled head, pipe, water box, extrude honed pump, ride plate, etc and could do just about anything I wanted on it. But I'm 62 now and since we are moving to the lake of the Ozarks full time I want another stand up to just mess around on. I'm leaning towards a two stroke 550 or possibly a X2 as I've had a ton of time on an X2 also. I'm still in great shape so the physical part won't be a problem. I would also consider a 4 stroke if it's not a tank. Recommendations welcome!