Some thoughts before people who really know what they are talking about show up...
How much do you weigh? iirc, the stock GT-R comes with an 800 wing which has surprisingly good performance in light air for lighter people. If you are bigger, you may end up wanting to add a bigger front wing. From what I've seen at regional level races, the aluminum masted Starboards are still pretty fast. If you are just freeriding but want a performance oriented foil, not a bad way to go, I'd think but some more informed opinions may disagree or shed more light. There should be a youth version of the Olympic foil coming out sometime that sounds like you might consider.
starboardfoils.com/pages/2020-iqfoil It will have the 900 wing which gets rave reviews - but again, if you are bigger, you'll get with the 1000 wing.
If you are just interested in being zippy but not pointy-end racing, there are a number of good other options out there: Zeeko, Zulu, AFS, Moses, Phantom just to name a few. I've seen last year's NP F4s marked down pretty significantly and they are very fast.
If there are gaps, it's going to be upwind performance where you'll see it (again, my semi-informed opinion). If you just want to motor around fast enough to scare yourself, there are options without spending a ton of money. Lastly, if you aren't going to have a foil specific sail quiver, you won't be maximizing the upwind performance of any race foil but are fine for riding around or even pushing the speed needle. So, before you go chasing the carbon fiber rabbit down the hole, make sure you are clear about what your objectives are.