I am moving to a wireless setup so I am selling my current wired headphones, amp, and dac and buying some B&W P7 Wireless. My current wired setup is like this: FLAC Music on Network Drive on PC --> Wifi --> Rasberry Pi with HifiBerry Digi+ and RuneAudio --> Digital Coax --> Schiit Modi 2 Uber --> Schiit Magni 2 Uber --> Beyerdynamic T90 I want the new setup to be like this: FLAC Music on Network Drive on PC --> Wifi --> Rasberry Pi with HifiBerry Digi+ and RuneAudio --> Digital Coax (or optical) --> *UNKNOWN DEVICE* --> Bluetooth Aptx --> P7W Headphones. What would be my best option for *UNKNOWN DEVICE*? I don't really want to spend more than £200 but I would consider it if the SQ is going to be much better than just using my mobile phone. The option use the B&W P7 Wireless in wired mode would be nice, but it's not essential. I know there are cheap bluetooth aptx transmitters on amazon, but do these offer good sound quality? Or is there going to be no noticeable difference using the above setup instead of my mobile phone? As its being compressed though aptx anyway? Any help would be appreciated.