I myself have owned various mpc's,older as well as newer.
Love the mv-8000, i mean i can go on about the features
but i just try to make music man.The learning curve took me buy surprice because it has many features,they could improve on the display size wise-but i love it i amagine i will
love it more once my VGA display arrive.The sequencer is linear but i've come to appreciate that more now since i can loop anywhere in my song any number of measures.I can go on,if you have any other questions feel free to ask.My opinion
if i lost all my toy's and had to start fresh MV-8000 over mpc4000 anyday and Iv'e used both.