I've tested the AirJax for a long time. They are really good, but are useless if you already own B&O A8, just because they are really close, too close :
- Sound reproduction is close : good highs and mediums, lack of bass. You get approximately the same sound as A8, but with a little bit less realism...
-Same lack of insulation to outdoor noise as A8 : not useful in airplanes or Paris Metro...
- Design is close, but it's a step back from A8, less comfortable
- For the price of A8, you have the mic... But there is only one button, 3 would have been better.
So, in short : I would advise anyone wanting a good set of earphones (and no in-ear) to buy a set of AirJax, but if you already have A8, you already have something a little bit better and really close.
If you want to try Atomic Floyd, I would suggest the HiDef Drums which are really, really good in-ear earphones (really good sound reproduction from highs to lows, you loose a little bit of realism compared to A8 but get bass reproduction and sound insulation, plus a mic). If you find them too heavy on your ear, the new MiniDarts are a really good choice too (but IMHO insulates too much from outdoor sounds).