All of those should be fine in zone 8 with good mulch. The ones that will do good and flower every season are the Rhodochlamys species, the common ones are velutina, laterita and ornata. The "ornata" hybrid varieties are not ornata at all and may not react the same at all, it is fairly certain the even "ornata" 'Leyte White' is Musa gracilis which is a Callimusa and will definetly react differently. Musa rubinea should definetly work, I have a small stock of these plants and will be testing there cold hardiness in the coming years in zones 4-6 roughly. Musa coccinea is also a Callimusa but should do fine in z9 if mature enough, they have many of these at the Leu Gardens in Orlando z9 (I believe). The true mannii is actually quite rare in cultivation and most of what is being sold as manii is usually a hybrid, sometimes even other species. Regardless, they should also hold up fine. Another one that I have seen in action that is looking quite nice is the Musa 'Bordelon', after seeing many of these plants up close and examining the flower details, Im quite convincied it is a hybrid of acuminata subsp. zebrina with either ornata or one of those mysterious "ornata" hybrids. Cold hardiness will have to be tested more but so far its looking like a great ornamental. One more to consider is Musa 'African Red' which is really-really nice and may even (possibly) be a new as yet undecribed species, but this is very preliminary and nothing is known for sure yet.

Is Musa laterita supposed to be cold hardy? I figured it wasn't coming from (Thailand?).
That African red sounds real nice, I'll look it up.
I'm thinking of testing a few different types in a borderline 7/8 zone this winter. MOst of them are one gallon now, so maybe I'll give them a another year before the cold test.
Thanks for the info Gabe!

Musa laterita is not especially cold hardy, however, most bananas are hardy to zone 8 so I would think laterita would be too. Its also a Rhodochlamys species and in its native habitat (northern India-ish), they frequently are subjected to droughts and can easily die back completley into a dry dormant state, this comes in handy when storing them as rhizomes over the winter. Also, these Rhodochlamys species have the ability to flower coming out of dormancy nearly every season, usually regardless of how long the season is, even if its just a few months.

Thats very interesting about them being able to flower after being dormant. Maybe someone should use some of those for a edible cross(but like you mentioned before, not easy to cross two sub groups)

"Maybe someone should use some of those for a edible cross"

You are good! That is EXACTLY the project I will be experimenting with next year using my university of colorado connections as well as a few other people. Im not going to go out and say exactly which crosses I will be performing, but I will tell you that I do have a plan (and the plants) ready and if it all works out then it could be a dwarf cold hardy early fruiter (5 months maybe)and maybe be able to store it as dry corms over winter. But I will just have to wait and see.