Last year I got a Medeli SP-4200. I actually discovered it when I was reviewing the new Kurzweil products. I discovered that Medeli was making the portable keyboards for Kurzweil. The comparable Kurzweil model is the KA-120. I purchased the Medeli SP-4200 from Sam Ash (dealer for Medeli keyboards) for a much much lower price than the identical Kurzweil KA-120 that Sam Ash was listing concurrently. Exactly the same two instruments.
The SP 4200 seems to have pretty decent sounds and only $479 on Amazon. How do you like the action? They are coming out with the SD200 Plus. It has USB audio, USB MIDI plus MIDI In and Out. Not that I need another keyboard (now), I may recommend it to my piano students.
Chris