The last two seasons I have taught myself cat sailing on a 1991 H17, but the boat is getting old and I would like to sail with a spinnaker as well. Moreover, I am in the lucky situation that I can spend some money on a (almost new) boat for next summer.
I always sail on my own on a lake (no surf), weigh about 115 kg / 250 lbs (strong, tall, low fat), and as said a spi would be a prerequisite.
Traditionally I would lean towards the Hobie Cat FX One or Nacra F17/F17 XL, but the Dutch Blade dealer offers a 20% discount on a new F16 so that may be an opportunity as well (at least from a financial point of view). There are no FX One/F17/F16 sailors in my club and I am not (yet) into regattas.
What would you recommend? Are there any other cats that I overlook? I enjoy the "simplicity" of the H17, how are these three boats different in terms of handling. Which of the three is the easiest/most tricky (sensitive to trim, most diffficult to get to speed) boat to deal with. What are differenes in behaviour light vs heavy wind/wave conditions. With my own weight what would be the best boat for taking crew along? Does the low weight of the Blade mean it is a less robust boat, or does it have a totally different structure? Maybe a more general question, how can I judge the robustness of a cat?

Thanks for your help!
Bart