M-Audio's Trigger Finger was one of the first MPC pad style controller only devices. Its been a while since M-Audio revisited that particular model. At the NAMM 2014 show, they are introducing the Trigger Finger Pro, which we caught a look at in the Media Preview area.
Its a pretty looking thing with a large, three line LCD monitor, 16 pads and MIDI and USN connections while still being bus-powered.
Available in the Spring 2014 at $399