Well, you already bought the roses, so what does it matter now? I am sure she will like them (very sweet!), but for something more unusual next time, try Stargazer Lillies. They smell better and are pink/white. You can even mix in a few pink roses if you'd like, although I ususally like to put in something pale green and spiky.

EDIT: I just wanted to say that ANY flowers are good flowers.