Launch Key 49 by Novation

http://global.novationmusic.com/keys/launchkey#

The Launch Key 49 by Novation is a MIDI controller that actually combines keys, effects, and the mixer on one interface.  This is a great tool to use during live performance, whether you are even using the keys or not you can control EQ levels of your audio program.  Just to add... this compact porduction equipment also includes 16 LED lights within the effect pads.  

The Launch Key 49 is a good fit for someone who does not like carrying around multiple MIDI's and interfaces.  There is a USB port to plug right into your computer, or there is another plug-in for an alternative power source.  Particularlly, Novation's Launch Key is an inexpensive means of creating software music.  

If you are into piano or have often thought about it but never wanted to invest much money into it, Novation makes quality MIDIs that would allow you to emulate a piano using software.  MIDI controllers like the Launch Key 49 being used more often now and they are a great way to expand your knowledge of instruments.