Ok, since you are going back and forth over which to get, I can only assume that you don't need to worry about sound leakage. That leaves the sound of the two to be your only deciding factors. Personally, if I could only have one of them, I'd go with the M1060 open, but I do love my M1060c almost as much (especially after they stopped stinking like glue, lol). The M1060 takes EQ better, goes deeper into the sub bass, and has phenomenal sound stage. The M1060c's bass hits harder but when pushed a bit via EQ it can distort. The sound stage is good and highs are crisp but not too in your face. I'm going to keep both, but like I said, if I could only have one, it would be my M1060.