If you are in good health now, and it sounds like you are, then the surgery and recovery both should be easier. Dysplasia (abnormal, precancerous cells) are not something to risk. Do your homework, ask lots of questions, and check out blogs and forums of those who have had surgery, so you know what you are getting into.
Some examples:
Healing Well Ostomies forumwww.j-pouch.orgronnielee-fightingforit.blogspot.com/2012/10/surgery.htmlGenerally there is a 95% satisfaction rate with jpouches.