I'm interested in what you discover. Likewise I am adding modules to expand my Doepfer Dark Energy but I'm building a small complete system now. I thought about going down the traditional Deopfer but to me by spending a bit more you get a lot more.

I have Polaris, Braids, Peaks, Veils and looking to add Maths - I thought about Function but people tell me on Gearslutz Maths is worth the extra $. And a good VCO module.

ModularGrid Rack