Stargazer wake edition or Hydrophase?

I am having trouble deciding what I want, so thought I would ask some opinions.

Hydrophase is paddle wheel. My concern is how accurate is this? And how long will work? I have a 01 Tige 21i and the speedo are paddle wheel and it seems I constantly need to adjust them. They are on the back of the boat though where Hydrophase is underneath so this may be better. Anyone know about this?

Far as Stargazer how is it for wakesurfing? and is it a pain for ballast? or going from wakeboarding to wakesurfing?

Any advise would be great. Thank you.

I don't ride rivers, so that won't be an issue for my decision.

Thanks for any and all help