Comish,
Welcome. I am sorry for your reason to be here. I giving you a link to a very good read about the 3 different diversions:
my.clevelandclinic.org/health/treatments/12546-urinary-reconstruction--diversion .
One observation is most people adapt and accept whatever diversion they choose. Beyond this, I am not much help as I have not had a cystectomy. However, as you go, post specific questions and someone will often have some advice for you.
EDIT ADD!!! Whatever diversion you choose, make sure the surgeon does at least 25+ of these a year. Also, many times one will steer a patient to what they are proficient at, so pick what diversion you want and make sure the surgeon has done lots of these.