Yeah that was this years upgrade, a Roswell Limited Tower. Although I'm still not running any weight besides the bit of water I take on during the day.
I actually prefer our I/O over our X-Star. The wakes are about the same size but the I/O wake is steaper. I guess the tower is about 2 feet taller on the I/O also.
Here are just a few pics of Kristian Coltman behind our unweighted 18.5 I/O. Due to his commitment to the basics from when he started riding he can go huge off a smaller wake with no problem.