
Which is my favorite? Hard to say. They each have their charms, idiosyncrasies, and downright fails.
For sound quality alone, it's a toss-up between the D-10 and D-15. My bedside unit is the D-171 because in the dark I can identify all the controls by touch. I alternate between the other three to take back and forth to the office and they all have excellent anti-skip protection.