I have the best of both, '05 X-star and '93 prostar LT-1 Limited.
You should be able to find a 91-94 prostar for $10-12K. '91-'94 slalom wakes are considered one of the best out there. Try to get one with the 285 hp Ford motor, or LT-1.
Also, don't rule out '84-'86 Mastercrafts. They are great classics with nice slalom wakes, light hulls so footing would be great too.
I was njskier on here.