Hello there. On my last trip to Japan I picked up the Pioneer XDP300R and I'm just getting to know it... However, I'm in Shanghai right now and I noticed that there is a sale on Sony ZX300 (the player I was initially looking at) I know that the Sony supports LDAC, which is useful for wireless headphones. The Pioneer supports APTX but I don't know if that standard is as good as LDAC. Sony has better battery life but Pioneer isn't bad either in that department. Putting that aside, in terms of pure sound quality... which one would you say might have the upper hand? Selling my Pioneer wouldn't be a problem because I have a potential buyer. The IEM's I'm using now are Chord & Major Rock (any opinions about those?) but I'm considering getting the FiiO F9 Pro as they fit nicely in my ears. Also, I'll be using noise-cancelling earphones when on the plane. I realize that my question might be kinda hard to answer but any input will be appreciated!