As a potential buyer of the XV-5080, one of my concerns is the lack of an arpeggiator which is found on competing products like the Korg Triton and Kurzweil K2600R.

Can any MIDI keyboard with an arpeggiator "arpeggiate" the notes on the 5080? And if so, any suggestions on a non-88 key, non-weighted controller for studio use (not live) of the XV-5080? A used Roland XP-10 or XP-30, new RS-5? Suggestions for keyboard controllers from any other company is fine too. (As a non-piano playing guitarist I find the arpeggiators really helpful.)