The long time breeder you know could probably answer your questions better than the current forum participants. As far as I know, we don't have any current participants who are breeders.
Two things that come to mind though, as I understand it, greys are particular about their mates. Simply getting another grey may not produce a pair. SRseedburners has a male and female and as far as I know they have not decided to be a "pair." So no guarantees there.
The second is that everyone I have seen talk about it says that once a two greys do become a pair, they lose interest in their humans and focus only on each other. That takes them from being companion birds to being a mated pair so I think your relationship would change.
I'm no expert though, just passing along what I have read.