For daily driver duty, I would stay smaller side 600 CFM range. You might give a few top end horsepower, but smaller will give a better vacuum signal to boosters, for better off idle performance, which is where much of around town and daily driver are used.
I would steer clear of the Summit brand carb. It is rebadged, for Scummit. If it was a great carb in the first place, why would it have gone away. The only reason it is back is so Scummit can put their name on it, private label, for more profits.
PS, no, I don't like Scummit or Jugs. They are the death of the local speed shop, in my opinion.