Deep v is also less repairable compared to a traditional box section - cant use rim puller, cant bend back as easily, etc.
They also require you to have extra long stemmed presta valves (may be hard to find)
And they don't work well with wide tires, wide box section would give more support.
So is this a utility bike? or a fast bike?
box section for utility, deep v if you're fast enough for aerodynamics to matter.