So, I've got a pretty modest system in the living room (Onkyo TX-8220 receiver, Onkyo C-7030 CD player, Pioneer PL-S40 turntable, all into a pair of Polk TSi200 speakers). Nothing special, but well mastered CDs and records sound great to my ears through this setup. What I'm looking to do is find the best, cost-effective way to stream music from my iPhone 7 without degrading the sound quality. The receiver has Bluetooth connectivity, which is fine for low-level background music or internet radio, but I'm considering subscribing to Tidal to have access to CD quality tracks (perhaps in an attempt to curb this pesky CD buying habit), and would like to see what you folks think is the right option to get the most out of lossless streaming from the phone. I realize this topic has been done multiple times, but I've exhausted the search option and still find myself scratching my head. For now, I've just been plugging the iPhone directly into the line-in on the receiver through the lightning-to-3.5mm adapter and a 3.5mm to RCA cable, which sounds pretty good but I've learned this apparently constitutes double-amping and significantly reduces dynamics. It seems the general consensus is to use an Apple Airport Express or Chromecast Audio to send the tracks through AirPlay/WiFi, though I'm wary of going this route as both products are now discontinued and I've heard using AirPlay can result in jittering or lagging if anything interferes with the WiFi signal. Would I be better off purchasing a small DAC like an Audioquest Dragonfly or a Schiit Modi 3 and connecting to the iPhone via a Lightning-to-USB3 adapter, then into the receiver's line-in or optical input? I'm not too hellbent on keeping everything wireless, mostly just finding the best cost-to-SQ ratio to stream lossless tracks. Any suggestions are appreciated!