I have both the Beyer DT770Pro and the Superlux HD660, which I just received the other day. Comparing the two I find them almost identical. The Superlux has a slightly more pronounced mid range, and is slightly less clear in the over all sound. But that's only marginal. The DT770 is a bit more pleasing to...
...since MH643 is their 'flagship' model I may try these first. They earned some good reviews at head-fi too. I'm using Superlux HD-660 for quite some time and they're OK for most things and I thought about going DT-770 for closed or HD-600 for open but for the price I 'll probably try the Somic stuff..
They are $16. Why not just give them a try?
Nobody has reviewed this product yet. Have an opinion?