Buying high quality orchids

[K-Sci]

A large, well-known orchid greenhouse offers three sizes of an in-house seed-grown Cattleya species from two renowned, high-quality parents: small, medium, and large. The small orchids are near blooming size, the medium orchids are well large enough and have bloomed before, and the large orchids are approaching specimen size.

You are looking to purchase ten orchids of exceptional quality for your breeding program, hoping for at least one of very high quality. Without visiting or consulting the seller or concern for the total cost, which size should you choose, and why?

Does the seller's establishment being open or not open to the public influence your decision?