That's really cool! It's nice you can experiment with different breeds to see which you like best. I think you'll like the Buff Orps. You can't really go wrong with those. And btw, I did just post the chicks on Craigslist.
I would say go for the Buckeyes if you can! I only have one so far but if I had the space I would get a whole flock of them. She's docile and hardy, and a nice layer but nothing crazy. She's hatchery stock though, so more bred for laying and less for meat and broodiness. I bet the ones from breeders are an even better dual purpose bird. This website has some links for where to get purebred Buckeyes if you do decide to get them in the future.
https://americanbuckeyeclub.org/