I've searched somewhat unsuccessfully so here I go. I play guitar in a power pop / punk / new wavish band called the Tiles. We kind of have a killers sound so to speak. Presently, we do not incorporate any keyboards or synths into our live performances. I will be playing 50% of our set on keys and the remaining on guitar. I know very little about keyboards. I do know the notes and some basic chord structures. That's about it. I will mainly be doing more melody types of lines and possibly some basic chords. I don't require any strings or any piano sounds. I looking for a fairly inexpensive keyboard (less than $700 if possible) for this. Any recommendations? Thank you in advance.