Far better to have a smaller number of high-quality cabs, than a larger number of lower-quality cabs.
Unless that old Ampeg cab and that old Hartke cab are doing you a heckuva lot of good (doesn't seem likely), I've flip 'em - pronto - for something more worthy of your Tonehammer. The Aguilar DB112s are reputed to make a magic combination with that head. Plenty of volume too. So you might want to be on the lookout for a pair of lightly-used DBs. But I know nothing concerning your tone goals or preferences of music, so that's just a stab in the dark.
Couple years ago, I bought a Hartke Hydrive 112 from one of the TalkBass members. I couldn't use it. It distorted at low volume, for no reason whatsoever. Probably I got a lemon. I sold it off locally - at a loss - and moved on...