The first build of my modular synth is quite simple, a mobile eurorack case with some different filters, bit-crushing, distortion/waveshaping, a mixer and LFO's for modulation.
System 1.0 is mainly focussed on filters and effects in order to complement and expand my Minimoog Voyager, thus making use of its nice oscillators and ADSR section but adding a lot of additional timbres to the synth.
All the modules are from Doepfer, they have a wide variety of products and are somewhat affordable.
It's better to gather experience now and start investing in more complicated & expensive modules later on.
Following modules where added at startup:
-vactrol lowpass gate
All kind of basic but already capable of some interesting patches!