The Hydrasynth and the Microfreak complement all this.
-- Hikove
I have a Hydrasynth that I'm building my modular around...although to be honest, its being built around that and the use of my DAW/VSTs and an Artura Minibrute 2 as well. I have an Arturia Minibrute 2 which will be added into the mix eventually and that is why for me, I chose to buy the Rackbrute 6U (much to the chagrin of many on here :) ) I currently have Maths and Quadrax that I am working through and its quite a rabbit hole using those with the Mod 1 and Mod 2 inputs on the Hydrasynth (I have the desktop version). I also just figured out how to use the Ring Modulation to accept audio into the Hydrasynth from my DAW and yet now another rabbit hole. Good luck with your build...I can't imagine doing anything but a slooooooow build with modular systems to get used to all the possibilities that it presents.
JB