I agree with Martyr. You have a few weeks to go before transplanting, at least two. If you transplant now you will destroy the roots. The idea of transplanting is to give the roots more room to grow. If they aren't hitting the side walls then they still have plenty of room to grow. The tap-root (the main, long, central, root) grows to the bottom of any pot very quickly.

They appear to be indica-dominant strains but its absolutely impossible to tell at this stage. The same strain grow in slightly different environments can look completely different.