I am a guitar player but, I am looking to buy a keyboard just to **** around with everyonce in a while. I want a cheap keyboard (because piano is too expensive and too big for my place), but apparantly there are different kinds of keyboards:
Synthesisers
MIDI
some please define these terms for me.
Anyways what I want is a keyboard that can generate sounds like piano, if it has some extra effects thats great too.

Like Korg DW 8000 Synth. I heard some clip from it, lots of weird effects but can I get the simple paino sound out of it too?