Laurie, one that puts a ton of side buds out foe me and stands up really well is Candy Heart. I got it from Gilbert Wild years ago and it's been a reliable bloomer even through all of the crazy spring weather CO threw at it.
I don't think there is really an advantage/disadvantage to buying conventional root divisions vs TC other than the fact that most TCs are sold at a smaller size than the traditional 3-5 eye divisions sold by the big growers and will take a year or 2 more to mature. That's just an opinion though—there are tons of peony growers who say they wouldn't buy TCs at all, that they are less stable plants overall; I haven't seen that.
