It's only taken me 6 months to read this and now I have to chime in!
I'm a big fan of outboard slalom boats and the right boat when properly setup will rival most of the best 3 event boats of the previous years.
I have used a Flightcraft 18XL with Perfectpass (and z-box) since 2010...
... and I've now just upgraded to a 2000 Malibu Barefooter, and have installed Perfectpass and swapped the Z-box across from the old boat. This boat has a direct injected Optimax outboard, which is unreal. The torque would rival any inboard and the throttle response is instant, so it performs very well with the Z-box. I've only ever seen times through the course between 16.08 and 16.11s. You can also hear the engine surge to compensate for the skiers pull, similar to the inboard z-box videos I've seen posted on here.
I expected the wake to be worse than the Flighty as the hull is essentially the same design, but it is a heavier boat, however it has a flatter table and I actually prefer it.
When I get a chance I'll put up a video of me running through the course behind it, so you can see what the wake looks like.