I can also think of other places in BA that have really good beef (Los Pinos comes to mind immediately; they has a very tasty bife de lomo), and I haven't been to any of the places you mention, but the best steak I've had here was a DJ.taste is always subjective. I found the faux-historical schtick kind of boring, the crowd uninteresting, and the meat, while good, not significantly better than many other places. And I find the non-meat menu to be small and uninspired, and not particularly good. I have no interest in pretending I am a rich guy in 1965, but, if I did, I would be eating a steak sandwich at La Rambla in recoleta. For parilla, these days I prefer La Carniceria, which has just as good steaks, but better everything else, or I like Corte Comedor, more informal but great, I like the classic old style of places like 1880 in San Telmo, I like the big Kilo sized steak at Proper, again with much better other dishes, or, I like simple old school neighborhood places.
There are so many choices for good meat in BA.