It's all a balance man, and these decisions are what is going to make your grows fun and interesting. Ask yourself, for starters, Do you want to wait longer until harvest? Do you think you have the room vertically? Expect them to triple in size when judging your space(on the safe side) Vegging for another 6 weeks is a bit much imo, but again that's your decision. They COULD be switched right now this second if you wanted, they are ready. Again, ask yourself...Do you want to wait longer until harvest? Do you think you have the room vertically?
Cheers