Personally i dont see the point of you buying an MIDI controller that has Pads, Swing, Note repeat and other functions you already have on your MPC, it whould problably be better to buy a normal midi keyboard.
But if you looking to use VSTi Plugs on your PC to use with the MPC than and MPK migth be a good choice because you will use its features to control software in a way that is simillar to the MPC.
I had and MPK and i didnt like it much, the pads feel like buttons.
The ASR kind of old but is one cool machine, it has multi-sample instruments wich you might find interesting, personally i think having 2 sligthy diferrent samplers is not much of an adavantage unless you ave a lot of gear, if thats not the case, get a Korg Triton, a Yamaha Fantom, Kurzweil..
b-righteous wrote:You won't miss those few knobs on the MPK that you have to manually assign to everything anyway.
Thats not true. Mpk has map files for the most commom software. Reason, Cubase, Fruity, Logic, Live, etc..
It even has them built in the memory wich you can switch in the machine itself.
But if you want you can custom map as the controllers and then save a preset for it.