Best of both worlds
Buying Sonos isn't like selling your soul. You can keep your turntable and your pre-amp - the question is more a case of whether or not you'll still use them.
Audiophiles cover your ears, my Sonos is connected to a decent amp and some decent floor standing speakers (complete with optional spikes, for people who have carpets) via a Sonos bridge. Audio streams are always uncompressed, playing MP3 music at 320kbps from a NAS device. I've tried lossless and cannot hear the difference.
The key thing - Sonos devices are incredibly easy to use. Since we took the plunge, we've stopped using EVERYTHING else. Anyone want a second-hand Marantz CD player? I give you good price.