Thank your very much for your feedback.
Ok i think i decided on a Case. As i know me i tend to spend a lot in something that sounds good an i will probably fall in love with modular very soon. So i think i will get a quite big first case. 12U 114HP from MDLR Case
Not sure if the PSU-3 is a good PSU for this Rack. But 2000mA sounds nice, but not enough if i want to fill up the rack.
So i set it up here and played around with your recommendations. Im not so sure if i can get into the 4vox. It looks like fiddeling in menues and i want to avoid that.
Also i ignored my 4000 EUR limit but i left some spaces. So maybe you have some ideas how to fill the whole Rack with modules (maybe more utilies) that makes sense (the fun part)?
But money matters and so i have to start with a very basic Setup (probably even lower than my 4000 EUR Limit). But as i am only human and like to dream, i wonder how you would fill up the rack :D