Since this forum is based on Sonos, rather than other companies, you may get better feedback if you were to ask in a generic forum, such as AVForum, or similar places. 

All Sonos does is look for a line level input, it really doesn’t care what the source device is. 

Also, if you ask elsewhere, the word “best” is best avoided! It’s much better to give an indication of how much you want to spend (roughly) because true audiophile/audiophool products could easily take you to $10k and above.