I think SolomonSeal is painting an overly dark picture (e.g. I eat whatever I want, haven't had burning in 10 years, and don't pay a significant price in the bathroom, though I do get reacquainted with some foods on the way out). OTOH, it's absolutely true that this is a big step, best undertaken when medical options have failed, and it doesn't always go as planned. Consider your rejection of biologics carefully - you can stop a medication, but you can't undo surgery.
I'm with you on J-pouch (vs. external ileostomy). I'm very glad I had my J-pouch surgery, and most people have an easier time of it than I've had. Choose your surgeon carefully! Good luck getting your life back!