I recently went to GC to make a purchase that was long overdue. I bought a 8in/8out MIDI interface. The salesmans was like..."are you sure you need this? Most people probably only need a 4in/4out model. The other model would most likely be used in a studio with alot of MIDI gear." He goes on to tell me what a MIDI patchbay/router is for...I let him go on for a few minutes..then I just stopped him to explain the intermediate (for a lack of a better term) MIDI set-up I have.
So with that said...the MPC 2500 is the heart of my MIDI set-up. With several sound modules, two MPCs, PC, Mac, Digital mixer, a control surface, and a 88-key keyboard controller....I have everything connected to the MIDI patchbay/router. Everything is connected one way or the other. So if I want to use an MPC to sequence hardware or software..no problem, everything at my finger tips. If I want to turn the Mac into a standalone instrument and sequence it from my MPC or PC...piece of cake. If I want to primarily run Nuendo as my sequencer, I can easily add hardware instruments tracks (manage/edit them using Studio manager, Motif or Fantom X editior, etc) or add a software synth or drum module tracks...then use my MPC as a percussion pad controller...piece of cake. It took me sometime to learn how to use all this stuff together (and I am still learning). It is fun being a nerd
With my set-up...the MPC is rarely used as a stand alone instrument. I usually start with an MPC for basic composing, but will then multi-track record into Nuendo (up to 24 tracks at a time). Nuendo as well as other software handles many of the big chores that are really inefficient on the MPC...such as mixing (dynamics, effects), sample editing/tweaking, etc. Although I do like to have more things packed into the MPC, most of the time the new additional functions go unused because of more efficient alternatives.