Thanks so much for all your wonderful suggestions. The more, the merrier!
@mom2cjemma -- I'm buying from Oakes because I won the gift certificate in this month's not-a-raffle.
Also, I lived in Knoxville for more than 20 years (Oakes is just outside Knoxville), and I live about 2 hours from there now -- so I'm hoping to pick up my daylilies at their daylily festival next month, which will be fun (and will also save the shipping costs). I went to the festival once or twice while I was living over there, but I haven't been for years.
Right now I'm thinking of starting with Tuscawilla Tigress, Orange Vols, Red Volunteer, Persian Market, and Wayside King Royale. But are Tuscawilla Tigress and Orange Vols different enough -- and different enough from Primal Scream, which I already have -- to be worth buying both of them? It's so hard to tell from photos!
Oh, and yes -- I'm definitely looking at other daylily sellers as well. But that gets reaaaaaally dangerous, because there are so many beautiful varieties out there!