I've got the sonos beam with a couple of play:1 for the surrounds
i've also got the sonos sub
I also have a HomePod that i got before i went sonos, i now mainly use it to yell at siri to turn lights on and off.
Even with the sub turned off, the beam sounds great.
The bass is a bit tighter on the HomePod though.
I'm not a "really loud" music person, but both can pump some volume. for "thumping bass" the sonos with sub probably wins though.
using airplay as the main output (how you would use HomePod) isn't a seamless experience, It will occasionally disconnect while it's off, so you'll have to reconnect the next time you want to watch something, If the app you're using has a custom player, the reconnect option might not be in the pull down menu, so you'll have to go to the home screen to select the HomePod.
I use
Channels to watch live tv, and it doesn't have airplay in it's menu, and is occasionally a bit funky when air playing
(i've got a pair of sonos one speakers in the bedroom that i use occasionally with that aTV, they're airplay 2 just like HomePod )
You should also think about which music subscription service you use.
if anything besides apple music (like spotify), you should add several points to the "pro column" for the sonos.
alexa is supposed to add support for apple music next week (Dec 17th), so she
might be able to play stuff on sonos then.
currently you can select apple music tracks with the sonos app, and alexa can pause and skip tracks for you.
or ask siri on your phone to "play _________ in the living room" and she'll send it to the sonos.
the play:1 and one have the same speaker and audio processing, the one just adds airplay2 and alexa.
if you want to make a left & right pair, they must be the same model.
if using as surrounds, airplay and alexa are disabled, so save a few $ and get the play:1 (You'll have those features from the beam)
you can also airplay to one sonos speaker that supports it and your other non-airplay sonos speakers can join that one.
and you can send the TV audio from the beam to any other sonos speakers.