Power or Manual Brakes

So I am putting disc brakes all around on my Mopar, just basic discs for a driver. I don't know if I want to have power brakes or not and if so, what size booster should I get. I have seen 7 and 8 inch boosters for sale.

Help me decide as my last 4 mopars have had manual drums so I have nothing to reference.

Thanks,
Rod