I don't have much to add on to what people have said above but one thing I would consider is that the Supra might produce a flatter ski wake at higher speeds for your wife. I'm pretty sure the Supra hull towards the stern is flatter than the X30's so your wake will be a little better for skiing. Just something extra to consider, you truly can't go wrong!

If you're a guy that likes tinkering with things and having a project then maybe upgrading the ballast of the Supra to impeller pumps and bigger bags would be a fun time for you.