Outdoor bluetooth speaker - Onxy Studio, Killburn II, or others

I'm looking for a portable Bluetooth speaker which will mainly be used outdoors.

I've looked at the Onyx Studio 7, the Marshall Kilburn II, and the Anker Motion+.
Anker is out, based on what I've read the sound isn't anywhere close to the other two.

Can't figure out which to get though. Some say the Marshall is overpriced, but then others say it has amazing sound quality. The Onyx Studio 7 also has good sound quality, but some have mentioned it gets much quieter on battery.
I also looked at the Audio Pro Addon T3+, but saw a few reviews mentioning bass was lacking and highs were overpowered.

Battery life isn't important to me as long as it's over 4 hours. I'm not looking for loud boomy bass, but I do want it to at least be there.
I'm only trying to fill a small yard with sound, 4-5 people at most. So huge volume isn't need.

Sound quality is the number one thing I care about. Second would be connectivity - I'd prefer at least AptX. Really don't wanna spend more than $300.

I'm leaning heavily towards the Onyx right now, but is there others I haven't considered? Should I look at the Kilburn again?

For comparison of what I like, I have the Beyer dynamic Amiron headphones, love how they sound. Also have the DT 770 pro 80ohm, they sound great but slightly lacking in bass for me.
The Status Between Pro IEMs I have I think are little overpowered in bass, but the UE Fits are a little underpowered for bass.