Yeah, I think that $hit is kind of unnecessary. I mean, just get a midi keyboard if you don't have one. Heck, all the M-Audio Axiom line of keyboard controllers have 8 Pads built-in and their pretty good, along with Sliders, Knobs & buttons if you get the 49+Key versions. I have the Axiom 49 and I don't even use the Pads to tell you the truth. I just get lazy to assign them. I just use the keys to play the drums or manually "paint" my drum samples in the pianoroll of FL, whichever I feel is faster or easier. Even 8 pads is good enough IMO. 16 is only neccessary with the MPC because of how you can slice the samples across the pads at different pitches.
Like 50Cal was saying, I think those pads are mainly unnecessary if your using them with the MPC because of it's sequencer and all the manipulations you can do with it. The pads just add that hands on experience. Now that I think about it, AKAI could have probably used piano keys instead of pads and make it more like a Workstation type of module, but I guess they chose to go with pads since it's unique, innovative, the pads represent more of a drummer feel (congos) and saves a lot of space instead of using a long horizontal piano layout. I mean their just rubber pads, Keys are velocity sensitive as well.