M only concern would be that if your system ever grows to where you have modular synths for more sounds that I don't know how you'd get to them if you don't have an interface with MIDI ports. Not knowing your system it's hard to envision. If you go PC to USB to keyboard controller and mainly use VST base virtual sounds that'd be fine but if you ever add anything external the hardware config is radically different. Any of this kind of stuff.