I have the opportunity to purchase a 2015 Mondo surf edition with the manual flow surf system with stock ballast. I owned a 2006 Regal I/O and have only wakeboarded in the past, but at 52 years old I think surfing is in my future. I am also looking at a 2017 Mondo with stock ballast and 2.0 system. I am wondering if anyone can tell me if the wake/wave is worth the additional 10k to buy the '17 over the '15?