I will start with a couple that have been on my list a loooong time. SDB Priwall. Used to be offered here but can't find it anymore.
SDB Robin's Nest. A Carol Coleman iris. Due to health issues another vendor is taking her irises but this one has not been available for a few years.
Baby Barn Owl. Not a U S iris but you never know when it will show up
Scott it may be more helpful if I leave off the commentary. If so I will go back and edit. Let me know how to help make this thread productive.