When I first starting buying daylilies I didn't know a thing about evergreen, semi, or dormant; I just bought what I liked. The dormants I have or had do/did well here so I don't hesitate to buy them now. Fred's "LILLIAN'S ALABAMA PRIDE" and James Hall's "BUDDY'S BLONDY" are dormants and do well here. I have dormants that me and Kim will be hybridizing with to try and get southern hardy dormants that do well here as well as in the north. We haven't had that cold of a winter, we've only had a couple of super cold days here and there and the dormants have done fine. Actually they are doing better than the semis. With it being warm here most days the daylilies put out new growth, but then when we have a couple of nights of freezing, on some it turns the new growth to mush which rots and can go into the crown and cause the whole thing to rot. I sprayed everything except the seedlings with a mixture of Banrot and Subdue Maxx today to help keep anything from rotting. If the seedlings rot then that just weeds out the ones that we wouldn't want to keep anyway.
If the price of SISTER OF PRAISE gets to where you won't worry too much about losing it then you may want to try it; it may do good there.