I will probably end up buying a TBAC at some point, but I like my pimped-out Harris BRMS with added Pod-Loc, RRS ARCA/Pic adapter, and Hawk Hill Talons/JKL Precision covers... 97% of the time it does everything I need it to, fast, with no drama. That means rocks, hoods, helos, tires, pipes, you name it. The fact that it's so simple and intuative to use makes up for the limited number of tricks it'll do most times. I upgraded it here and there while learning to really shoot, and it sort of gained more skills and performance as needed.
For the other 3% of the time, when I need something fancier... I borrow a Ckye-Pod from somebody lol.
I don't care as much as some do about performance off a bench or prone these days, and try to spend less and less of my time doing that... but if I did spend a lot of time bench/prone, then I might go for an Atlas CAL/Super CAL or maybe one of those big/wide Accu-Tacs since a Harris can't really match the wide stance and rigidity those (including the TBAC) are born with.