Actually, this one just raised a bar to a new quality budget level of under $20. I got my pair as a review sample from Zhengnan shop who is planning to start carrying them on Amazon soon. But as you have seen, plenty of others sell them now.
Btw, as a general comment, I'm NOT hyping anything and just providing you guys with my honest opinion about a lot of products I receive as review samples directly from manufacturers or retailers. Doesn't matter if I spend hard earned money or just lots of hours I put into my review work (I write a lot of reviews for a number of android websites, on amazon, and now on head-fi). All this is my honest un-biased opinion, and I'm hoping I can help you guys save money by making a better choice what to buy. Unfortunately, I see that instead I'm contributing to everyone wallet diet...