Black spot is always an issue here in GA. I've never seen rust on any of the roses.
Bishop's Castle, Glamis Castle, and The Prince, that are planted in the front garden have all done well. Christopher Marlowe and Crown Princess Margaret struggled, because they were planted in a different bed that became too shady, and they've done much better since they've been moved to a bed where they get more sun. All of theses roses came from Reagan's, grafted.
The roses from USA Austin's are William Shakespeare and Falstaff, that are grafted, and have done very well, and Young Lycidas that is own root. YL has struggled to gain size, but has bloomed several times. However, Falstaff had to be removed, I saw suspicious growth for RRD, and I didn't want to take any chances.