Advice on new carb purchase

I have been running a Holley 4160 600cfm vacuum secondary carb on the 360 in my 68 Barracuda and I want to purchase a new carb. The car runs very well with the 600 but I want soemthing new that is sized more appropriately for the engine.

The 360 is a 10.6:1 magnumed headed motor with a comp XE268H cam and a CrossWind dual plane intake.

The car is 99% a street car so max high rpm power is not a priority and I want to stay with a vacuum secondary.

I have narrowed my choices to a Holley Street Avenger 670 or a Barry Grant Road Demon 725.

What do you guys think and why?

Thanks