vacuum secondary vs. double pumper?

I think i'm gonna spring for a new carb at the end of the week and i dont know if i should go with a vac. secondary or a double pumper?

This for a 360 duster, 904 tranny, 3000 stall converter, street/strip car.

I'm currently running an edelcrap 1406(600cfm) and the vac. secondaries seem to work ok, but is there any justifiable performance edge to the DP?