The first iris I would buy from Schreiner's would be Owyhee Desert (my avatar). It is only sold by them, never on sale. Smells wonderful and the bloom stands out in the garden since it is unusual. It is not the fastest increaser but has bloomed every year for me. And yes, I am giving you an extremely biased choice!
Do you have any color in mind? There are several I would recommend depending on color.