I would have no issues going to an older boat as there's some great hulls out there that surf amazingly with the right weight.
some of the guys here have put gsa on some older boats and seems that they have good luck with that setup.
if I was spending your monies and didn't mind an older boat, go for it and add a surf system with enough ballast but not ever owning one I can't speak to your success on the 22ssv hull. the deeper taller boats today offer better ride and can take a lot more weight without worrying about water coming over.

I was not a fan of suckgates until our last boat and it put out a decent wave with one. I still preferred it listed so I didn't have to mess with it. our current boat is same hull but has surf system. it's push a button and surf so convenience is great and wave is consistent from day to day not to mention better than suckgate but some of that is in the tab design. with a suckgate it varied from day to day. listed was same every time. imo suckgates work but they are a hassle. surf systems take the guesswork out and are much simpler but cost.

helix will put out a good wave but it'll likely be shorter than those with 22/23ft boats. if you run with a crew that have a bigger boat, you will likely see the difference.
that said I bet the helix is a wakeboard monster and easy to dial in. the mondo I spent time on was amazing and much better than my 22ft of the time. my old 20ssv became the shop boat for the summer when i traded it. they were all boarders and said that boat was crazy good. guessing but nothing to back it up, that the shorter boats are easier to dial in a wakeboard wake.