well bear in mind that utility modules like these are generally quite inexpensive - stick as much as possible to brands like doepfer for a matrix mixer, a sequential switch, some passive attenuators and an mi kinks - probably not much more than the oscillator cost you and much much more useful! an oscillator is an oscillator - cheap utility modules are possibilities
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities