I already owned an LM3 when a secondhand CMD121P came up for sale locally for a good price, so I bought it out of curiosity mainly.
However, it was so capable that it became one of my gigging set ups after I bought a secondhand NY121P, once again mostly out of curiosity. I mean, how good can these tiny cubes be? Well, the answer is really, really good. Combined, they could handle just about all but my largest gigs with ease.
It was only after my CMD121P developed a fault (cracked speaker output connector solder joints) that I decided to replace it with another NY121P so I could gig my LM3 with both cabs.
Over the years I've owned many of the larger Markbass cabs, including the brilliant STD104HF, not so brilliant (IMO) STD106HR (which in its defence, may have suffered with some kind of phase cancellation problem after I had to rewire it; oops!), and a pair of TRV121H.
I now only have three; a TRV102P which is brilliant for bar sized gigs, and the two NY121P for larger venues with inconvenient, complicated load ins/outs.
I'd recommend taking your CMD121P and NY121P (if that’s one of your 12s?) (a physically smaller rig than your two TRV102P with head) to your next rehearsal or gig, it's an amazing set up that punches way above its diminutive size with plenty of controlled low end at volume.
If you don't already own a NY121P, I think I know what your next Markbass purchase could be. (-;