I personally would suggest to go with larger tubing. Larger tubing does take a bit longer to fill, but pre-boost throttle response actually gets better.
A good example would be with the old Buick Grand Nationals. You could get a kit that had a larger tube that went from the intercooler to the throttle body, and an over sized weld on elbow for the turbo side of the intercooler. It made a great improvement in the pre-boost power. Any extra time it may have taken to fill the tubing/ intercooler was more than made up for in throttle response pre-boost.