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Looking like they're stretching well mate , never grown that strain bit as @zannabis7 pointed out , could maybe do with more light , I don't mean time in light , I mean intensity , I'd move my light closer to the plant as it seem to be using its energy stretching towards the light rather than fill out ... don't panic tho , looks healthy ! .. I noticed your using a 600w is it dimmable ? If so , I'd dim to 250 or 400 and move light closer to plants .. I'm no expert tho mate , that's just tips I've brought from photos

You may transplant now but be gently but also you may choose to go with same pot but ofc yield will be sacrificed👍wish you best of luck man

What light are you using? You say you haven't watered yet? I'd say they should have been watered a few times by now. If your going to transplant do it ASAP into a fabric pot 3 gallon. Use all the soil you have in the pot currently and use the rest of the volume as perlite. This will give lots of aeration to the roots. When you water you need nutes. If you transplant you will shock them but if you use a root stimulator or and some organic fert like kelp extract you shouldn't have such a big problem. If you manage to get another 2-3 weeks in veg at that stage your lucky. Worst that can happen is very shortly she's going into flower and your going to have a bud on a stick, or at least a 1ft plant with 10gs on it... Good luck anyways dude let me know what you decide to do, if you need any ideas message me👍🏼

@PharmaZ, Thanks for the comment! It's 600W HID light. I just watered them last night, and they are looking better now. And I won't be able to find the items you said soon enough so I'll have to skip the transplanting then. But I'll definitely do the 3 gallon fabric pot with perlite thing with my next grow!