Personaly I would flower them in the pots they are in. They are a long way from filling them.
They would be set back a bit from transplanting.
Then you have a short time to flower. It will take a week or two to get into full flower after you hit 12/12.
I have never used a pot over gallon sized. I keep my grows small.
So if I leave them in the same pots, flowering will be shorter?