I agree with the eyes. The darker they are, the younger the birds are typically.
The living situation sounds ideal! I would also add some perches. and if you on one side added a couple of wooden boxes they could get into, that's where they would lay their eggs next time, and also go into when it's rainy by or cold. Don't fly them yet if you want to move them to a new coop, or they will be homeset there permanently. Because if you plan on making a coop later, they won't settle well if you have flown them. I also don't think I would fly the one with the eggs, though I tend to error on the side of cation...
How old where they when you bought them? We're they sqeaking? If not, and the previous owner had flown them, they aren't honest to you quite yet. Let each pair raise a few rounds of babies if you don't think they are home set before flying.