I've got my mpc set up like udenjoe.
Mpc2500 mid out to access virus C and back to mpc.
Virus and mpc audio to 01X mixer for tracking to cubase sx.
Mpc audio out 1 to 6 to 01X and 7 and 8 to virus input for filtering.
I've also got an emu e5000 , some soft synths , an electribe er1 another mpc1000 , etc... but somehow i allways go back to just these two pieces.
Drums on mpc and synths on the virus.
The virus can handle everything ,phat bass , leads , FX , strange noizes and you can use 16 patches at the same time.
Combined with the sequencer and the punchy drums from the mpc it's the perfect match.
At least for me it is

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Greetz...