Oh God...That is VERY Hard.Sorry.I don't know what I could say to help.That's tough because I'm like you,once their here for a few months I can't even think of anyone else taking them.But you know youre limit and I'm sure they will keep in touch with you on how they are doing.Maybe they could help you decide wich 2 They could come over and see which ones they fall in love with?
Have them stay for a few hours to be sure.Or come over 2 different days for a couple hours each day.