I also bought 8010a this time, covet 8010 of the small cute, easy to carry, but there are concerns that the sound is too small, after all, 3 inch small stereo, so also bought 8020d. I wanted to buy 8030c, but I thought the desktop was a bit big, and I chose 8020d after repeated trade-offs and bought two pairs. The fact proved that my choice was very correct. First, I felt better on the resolution than 8010a, the sound field was bigger, and the size advantage made the bass more satisfactory. In short, desktop multimedia use is still more recommended 8020d, at this price can be said to be the best.