Trying to decide if I should go for the CKN50 or 70. The price difference for me is exactly the cost of the FX40s, which I'm really interested in thanks to this thread. I'd hate to lose that opportunity, and after years of pretending it's noble to buy $200-400 IEMs that honestly were crap bang for the buck, diminishing returns has made me bitter. It's not that they're not good, but I'm no longer willing to blindly sink extra cash into a pair of phones.
Price-wise the XB90EX is as expensive as I'm willing to go now. It's lurking on my to-buy list somewhere in a parallel universe, battling my unsated yearning for the older EX510 and 310.
In my 10? 12? years of on-and-off head-fi visits, this is the best thread ever, so thanks to all of you
The 50's are very good, but the 70's takes it to another level. I would go straight for the 70's.