Taylor

Hey Kevin,
Welcome to the forum!
It is most likely Musa 'Orinoco', because it is the most common, but I could be wrong.

Also, do the stems die completely or just a few of the outer sheaths? Typically a few sheaths will die but the rest of the pseudostem(stalk) will remain in tact, and will resprout from that. I would cut them down in spring, but if you need it to look good, I assume fall would be fine. The reason I say this is because if you cut off the sheaths (IF the whole stem is dead) then you might increase the chance of rot when cutting when cold and wet.

And yes, there are tons of varieties!
Taylor