its not always about gazillions of features for everyone...some people need everything in the 1 box and some people don't. i'm still a believer that its better to be an expert at 1 thing than a jack of all trades and good at a lot of things, and that's how i'd compare the mv and mpc4k. the mv is good at a lot of stuff, but plain and simple, creating, editing, and sequencing drums and samples is still better on the 4k. i for one hated the like 1,000 quantize functions on the MV but the 8 i have on my mpc just works right every time. things like effects and arranging (with the lcd) are definitely more there on the mv.
its also bogus how to access a lot of the features on the mv you need the lcd and the mouse...i thought the whole point of hardware was to get away from the clicking and all the visuals? i found the mv to be so packed with features that scrolling around the machine felt like a job, whereas the mpc just does what i need quick and easy.