possible MIDI mpc-4000 set-up?

I want to make my MPC4k the heart of my studio. Considering midi; is the next set-up possible and workable?
(By the way: I'm not an MPC-user yet, until next thursday...
Midi-out of MPC4k:
1. Machinedrum and Electribe-EA-1
2. KorgKarma
3. NordModular and AccesVirusC
4. Scope-Board (Creamware pc-'soundcard')
The MPC is for sampling and for MidiClock(master-input for CubaseSX)
Midi out of Cubase to midi-in of masterkeyboard (SupernovaII-proX).
Masterkeyboard (SupernovaII-proX) midi-tru to MPC4k (midi-in)
Does this work correctly?
Futher: I've got a USB-Midiman4x4. How can I hook this into my midi-set-up?