Personally, I would wait for the chicks. My reasons would be:
If you want the roosters to live peacefully, a few hens are probably worse than none at all. (No hens, no reason to fight. Lots of hens, some for each. A few hens, trouble. Or so I've read.)
Hens that have been in cages will need some time to adjust to living outside of a cage and acting like chickens. It will be some time before they will be ready to spend time with the roosters.
Every time you get more chickens, you risk of bringing in some kind of disease. Hens + chicks makes two sources of possible diseases. Because the hens have lived longer, they have also had more opportunities to catch diseases and parasites (although parasites are rather unlikely if they are living in cages.) Baby chicks are less likely to have diseases because not many things transmit through eggs, and because they haven't lived long enough to be exposed to very many things.
I don't know what decision is right for you, just sharing my thoughts since you asked for opinions