M-Audio Oxygen 49 3rd Gen by katstudio
I really love this MIDI keyboard. The specs: 49 keys, 8 sliders with 3 banks, 8 knobs with 3 banks, mod/pitch wheels, transports, LED screen.
This thing is fantastic and simple with ableton live 8, providing great sound on a budget.
EDIT: My Oxygen stopped working completely. so it lasted just over two months. so it's not durible at all. As well the lack of MIDI in/out has become quite annoying.