Thank you very much, Dusty. That's the kind of keyboard I'm looking for. I don't know Alesis as a brand, so I was looking at Yamaha, Korg or Casio in that price range. Hadn't heard of Fatar before. It's great knowing that the infamous DIN MIDI connector is not a standard anymore. I don't have a MIDI/ADC controller card, in my Mac the only DAW software I've tried so far is Garage Band. It comes with a few instruments included. The App (in the old version my MBP supports) has a tiny keyboard which you can play note-by-note with the mouse, which has been my ear-training tool for a couple of weeks. I'd need the keyboard to play chords, but it's very convenient it has its own speakers or at least headphone out.
Have you tried that keyboard, do you like the feel of the keys?