Headphones: HiFi Man 400i, Philips L1, Sennheiser momentums, UE 6000, Sony VR6 DAP: Apple IPod touch 5th gen FiiO Produces: E-11k , E,17k Reviews: none yet Region: Williamsburg Va. Native Language : English but also speak Arabic. Sent from my iPad using Tapatalk

Sorry for the delay been under the weather. I really don't think the BT version matters when it comes to latency. I do notice that 4.0 uses less battery than 3.0 all of my 3 headphones have latency issues to some extent. The Beats seem to have less but it's still there. I don't have any regrets...

I own 3 on your list. Beats studios 2.0 Harmon Kardon Parrott Ziks For what your looking for I'd get the Parrott's. The have unlimited adjustment potential and sound really good. The only problem is battery life. If you are looking for that the Harmon Kardon's are your choice.