BadReligionPunk
Headphoneus Supremus
I think the big thing is that BQEYZ actually spends time tuning their BA drivers and as a result get a smoother less harshy treble then KZ.I just got my BQEYZ KB1 ($20USD) and it sounds like a well tuned KZ! OMG. I've been waiting for KZ to do this for years. It doesn't sound as exciting as the ZSN but it sounds great none-the-less for hours of listening at a time.
If KZ can start using better components they will have a winning brand and it will show as this is the largest earphone thread on Head-Fi.
On a side note - I got my NiceHCK copper 16 core cable as well and on the non-Pro ZS10 the music sounds much worse than the ZSN Copper cable, which doesn't sound bad at all. That ZSN cable is less than 50% of the price of the 16 core and it sounds a 100x better!
In other cable news, it was said on the cable thread that 16 core cables don't sound as good as 4 core and 8 core ones, so this will be the last 16 core cable for me.
Sounds like they tides have turned a bit though with the ZSX and possibly the C12. Cant wait to see whats next.
Still love the ES4 and the ZSN though. ES4 is tethered to BT20 and is a hip hop machine and ZSN's harshy treble is actually really good for Punk/Garage Rock. Atleast for me it is. Love the way guitars sound a little hairy with them. Good stuff KZ!