I would personally rather have two of the Charges than a single Extreme for the same cost. And while I am a fan of external DACs on my main rig, with these speakers I wanted simple and portable. If you add a DAC to a single speaker you won't get its benefit on any other speakers you pair up wirelessly. That alone makes it a non starter for me.
I pair a couple speakers together and place them on opposite sides of my patio (off the ground is helpful) and Bluetooth in with Tidal or Qobuz from my smartphone and it works great for barbecues and get together. If we want to listen critically we hit the main system inside.
Also, YouTube has a ton of comparison videos on the Flip vs Charge vs Extreme if you need a better idea on size of these units and other features.
I pair a couple speakers together and place them on opposite sides of my patio (off the ground is helpful) and Bluetooth in with Tidal or Qobuz from my smartphone and it works great for barbecues and get together. If we want to listen critically we hit the main system inside.
Also, YouTube has a ton of comparison videos on the Flip vs Charge vs Extreme if you need a better idea on size of these units and other features.