Since it's aimed at pro's I don't think it'll have speakers since a pro would use decent monitors or headphones. My suggestion are the Audioengine and Kanto speakers which are all well built and come in various sizes. I use the Audioengine A2+ which have very decent sound on their own. I paired them with a subwoofer under my desk which makes them very good.
Homepods are probably more than nice for music, but let's assume you need to show a video, isn't the delay on the homepods going to be a serious hurdle ?
[Honest question, Apple doesn't even sell Homepods where I live]
I tried using my HomePod with iMac Pro. While AirPlay 2 may reduce latency from earlier implementations, the delay isn't good for systems sounds or anything requiring quick response.
depends, I got imac pro and want to upgrade to mac pro/XDR display as well. I usually play music and radio by imac pro's built-in speaker which is very nice in quality. I got a pair of KEF LSX which is convenient for setup, but sometimes still struggle to press another button to turn it off and it has to lipsync when using airplay, not as smooth as when you use the internal speaker