Advice on 210 cabs with Markbass LMiii

Hey fellow bassists,
I hope you will be able and willing to give me some advice on cabs. I have read quite a few posts on this subject, but could not find my answer...
First let me tell you that I have not really an opportunity to play and listen in shops...

I have a lovely 2013 American Standard Pbass with the Customshop pickups.
Recently I bought a Markbass LMIII to replace my old Peavey Firebass.
My cabinet is an old Peavey 15" BW, front ported.
I didn't like the sound with the Firebass, it was harsh and boomy. But with the new head, the sound is still harsh and boomy.
Besides that, it is a big cab, and heavy ;-)

Currently I am looking for a more portable and warmer sounding cabinet.
I have been reading about and YouTube-listening to some cabs:
Markbass 102p traveller
Markbass 102hf
Hartke Hydrive 210
Tc electronic rs210
These are within the pricerange I am looking. Besides that, they are not heavy.

I want to use one single cabinet, since our band, a soul coverband, does not play really loud gigs, and we have a small PA.

Which cabinet will give me warmth and clarity without harshness and boomy-ness?

Thanks in advance for your help!