Prissy is a hybrid - and not an easy one to find, so I'd do both, personally. But I'm a dangerous girl...bad to ask, really! And that's especially true when besseae is involved as it is a favorite of mine. Just be glad Eric from NY is out of town today - then you'd really get an earful! He was searching for Prissy for ages!
Wings of Fire is a known cross of the species besseae and should do well for you also. But, if you are nervous about the species, start with the hybrid and see how you do, as it will be a bit easier.
Prissy is about 3/4 besseae species, so it's a good one to practice on. St. Ouen is besseae x Hanne Popow, Hanne Popow is besseae x schlimii. So, there's a lot of besseae in Phrag. Prissy.
If you had to choose only one, I'd go with Prissy - grow it, practice on it, then get a besseae. Or just get both now!
oh, both should stay fairly small also, 12-18" leafspan at the most, likely. Being that there is no longifolium or sargeantianum in the background helps to keep the plants down in size.