sonos amp

I could use some wisdom, please. I have been running a small patio 2.1 setup for 3+ years and it's been great. Sonos Amp powering a pair of Polk Atrium 6 and then sub out from Sonos to an old Polk SWA500 subwoofer amp and the polk amp wired (4 conductor) to a Polk Atrium Sub100 (dual 8ohm voice...

Currently looking for a streamer + amp to run my Q3030i speakers. Purely just use airplay2 or stream direct from unit for living room music listening. How does sound quality compare from a cheaper setup like Wiim Pro ($220aud) + SMSL A300 ($275aud) to a more expensive all in one unit like Sonos...