If you do play piano, or you’re planning to learn in the long run, the A61 or A49 may suit your needs better than the limited immediately-available range of the A25. The 25 indicates the number of keys the device has, where the other models are the 49 and 61. I got my mitts on the littlest one, the A25. With the A-series you get the tactile feel of a semi-weighted set of keys combined with more than a dozen sound-shaping tools (in the form of programmable knobs and dedicated buttons) you can manipulate by hand. So why use a MIDI-controller? For the exact same reason DJs still cut records and cello players still rock the bows: because there’s no digital substitute for the human touch.