I wouldn’t worry about using Airplay, if using it suits you. Airplay is lossless and serves up 44/16 red book - and nobody has been able to prove that higher rates or resolutions give audible differences.
Bluetooth on the Node is the aptX HD standard so if your phone is up to it this is “Hi Res” 24 bit. So actually “better” than Airplay (and standard CD) if you believe you can hear difference above 44/16.