I recently bought myself a pair of JVC HA-FXC80 IEMs as a sub for my excellent Panasonic HJE900 IEMs when I'm out cycling. The Panasonics set me back £200 at the London Apple retail store and the SQ of them are absolutely beautiful. However I couldn't believe my ears when I tried on my recently bought JVC HA-FXC80. The SQ of them through my Sony S639F is very close to the SQ of the Panasonic HJE900 through the same DAP and what is even more unbelievable is that they only set me back £30. The highs on the JVC IEMs are very similar to my Panasonics and so too are the mids but I feel the bass isn't as tight and clear but the bass is still good enough. Anyway I would highly recommend those IEMs to anyone on a tight budget who is looking for excellent Hi-Fi SQ.