For years I've been using Logic exclusively for sequencing using Battery, Ultrabeat, BFD2, and GURU. However I do use my MPC 2000 from time to time for the feel. As a producer, I like to change my approach to composing and arranging to keep it fresh, so now I've configured my setup to use the MPC as controller/sequencer where I sequence the main rhythm parts in the MPC triggering VIs in logic. Once the basic rhythm parts are done in the MPC I dump the midi info into Logic to complete the arrangement. This workflow gives me the best of both worlds and the feel only an MPC can give.