Hi, I see everybody has open up to the point of having aptx on any bluetooth headphone is the way to go.
I caught on to the aptx thing when I was first getting some good headphones. Since my phone at that time was a Samsung Note 3, with aptx, I made sure any bluetooth headphones I purchase HAD to have aptx or it was a no go. Some posters said it was hard to tell the difference. Well, moving forward, and now I am pushing a Samsung Note 4, also with aptx, and my two favorite headphones, the Harman Kardon BT and Sony MDR 1RBTMK2.
The Sony are "grey market".. Both of these headphones have aptx and serve me well. The Sony is the killer,
however, the Harman Kardon with its clamping force is my gym, running and bicycle headphones.. You should see the moves the old man does in the gym and the HKs don't budge..
Let me tell ya, I have advanced a little.. My Note 4 is sporting a 128gb class 10 sd card. On it, I got movies and flac files galore.
The old man be cooling it walking down the street with my Note 4 playing "Guardians Of the Galaxy" in flac.. Oh boy, I got the whole soundtrack in flac, also, Kill Bill 1 & 2 Ennio Morricone, etc all in flac.. The Sony MDR 1RBTMK2 give up the goods for my price point. I paid $335 shipped to my door for the Sonys, and $99 for the Harman Kardon BT(refurbished and like brand new).. Also, I have JD Lab O2+ODAC and the Fiio E18.. Both these dacs work perfectly with these phones.
On the "grey market" Mk2s, I was assured by the seller that if ANY warranty work needs to be done, all I have to do is ship the phones back to them in the original box and they will take care of it. Over a year with the MK2s and not even close to a problem.
Also, somebody mentioned that the Sony people here in the USA said the MDR 1RBT and MDR 1RBTMK2 are the same. No way under the sun. The local best buy was selling the MDR 1RBT for $500 and I got the improved and aptx version the MDR 1RBTMK2 for $335 shipped. Don't see how ANYONE could get the older model, considering the price and lack of features at the newer mode.. If I not mistaken, even Samsung has come out with some headphones in the 3 to 5 hundred range. They are wireless, and just the high price Beats, I don't think they are packing aptx. ??
At this point, Harman Kardon has stopped selling the refurbished HK BTs for $99, don't see them at all, the ones you do see are for the $250.. My point was any bluetooth head phone purchased this day and age, MUST have aptx.. Everytime I listen to the Guardian Of The Galaxy in flac off my Note 4 or my Tap Pro 8.4, I break out into a lock grin.. My coworkers just know I am crazy!!