You are so right Rui! The Zorin team puts in a ton of work to make these releases. They are a bit slower to release them then I would like, but at least they are releasing great OS's. 
I really respect the fact that you wish to support the dev's, I am
% with you for that. To answer your question, pretty much all the mods, including me, have bought PRO for sure, and so have many members.
BTW, please make a post in the Chat About Zorin forum that will be on the subject of your computer purchase. I love talking about hardware, and I am very curious about what kind of computer your planning on. This way we can keep from going off topic in this thread. lol



(Which comes as Zorin Education Core or Zorin Education Lite...)