I think a lot of this all depends on how serious you take your skiing vs wakeboarding. IMHO the X-7 would be a good crossover and have heard the X-2's have a decent ski wake as well. Another factor to look at is how much you are willing to spend on a boat as well.
1998 Stingray 180LX
2000 Infinity ZX-1 good riddens
2003 Prostar TT 197 sold
2007 Prostar TT 197.....special delivery from the dealer 3/18/08 sold 6/7/11