Active speaker similar to Sonos Play:5 for RoPieee setup

You’d need to mix the stereo output to Mono - but it seems you can do this with roon DSP

My PMCs are two.two.6s - which are lovely but quite expensive. PMC’s least expensive active monitor is the result6 which is still much more than a Sonos unit (and only takes an analogue input). But the studio monitor market is very active - and you should be able to find something within your budget. Adam, Focal and Genelec all make great monitors.

The IKmultimedia iLoudMTM is amazing for the price

The good news is that studio monitors are usually available in singles.

You’ll have a lot more choice if you go with a DAC Hat and analogue monitors.

You’re correct in they are mostly designed for near field listening - but mine still sound great in far field - and I expect many studio monitors would challenge sonos for SQ far field. And of course you can rebalance the EQ via roon DSP if you need to.