IMO. Vertical battery plate V mount or Anton. Your always going to add accessories and need D-Tap power and the longer run times.
Use the BPU-60 when you want to travel or just be small. As for weight more the better for rear balance.
I still favor the brick style batteries. They take no special mount, they fit in the regular battery slot on the back of the camera. They have D-tap to power accessories. The various brands run 92-96w. That's about twice the wattage of a BP-U60 (56w) for the same price and the BP-U60 has no d-tap. They both charge on regular Sony style chargers. The most bang for the buck in my opinion and because they hang out in the back they still shift weight to the back.
FYI: You have to put the single pole plug back into place to charge them. The single pole to 4 pin XLR adapter is ~$30. I leave mine in the camera because my bottom plate and rails protect it.