I'm sorry but it feels a bit cheap to get the default answer to this, my question was specific about which strategy you would chose to build your first system over time and all I got was "beginners - read this" answers that I know and are almost all taken into account in the setups in my post:

  1. I'm only interested in one row because I don't have the room nor the budget for more but any of those I suggested will already be a real a significant step up from what I currently have
  2. All of the modules you talk about are in all the systems I included, and there is still room...
  3. That's precisely why I built a system around the 0-coast...
  4. I did, and bought Reaktor too, but the interface is just not for me

I looked around a lot for answers to my question and found no answer, otherwise I wouldn't have posted it.
And I know there is not one right answer to this, but I wanted to have opinions from people who've been through that already.

So I'll rewrite the question more concisely:
What's the best strategy when you start out?
*Start small with a few small modules and build a more complex system from there?
*Start big to get more complex and interesting modules from the beginning?
*Start with a pre-build synth voice and add modules to it?