I don't understand you guys.
There are a limited number of these awesome machines out there, and you guys encourage this guy to hold one hostage in his basement while letting "Logic Drummer" make his beats for him?
That machine deserves to be in the hands of someone who appreciates it and will use it for what it is intended. Not stored away in the attic like some forgotten Thai sex slave.
If you are not going to FEED her....SELL her! And honestly, man, if Logic is enough to pull you away I find myself curious as to how you ended up with an MPC 4000 in the first place.
Either way, the fact that you are asking "Logic...MPC4000.....hmmm....this is TOUGH" answers the question. Sell it, and buy a cheaper MPC, You won't even know the difference except you'll find the newer one easier to use.