Future,
I would most certainly bank sperm. I was a healthy thirty year old and had all in one J-Pouch surgery eight years ago. I do not regret the surgery, however, I produce no ejaculate and it seems no semen at all. I do however feel the same sensations during orgasm, so that's cool.
My wife is 17 weeks pregnant due to IVF and I owe it all to banking my goods. Do it to be safe.
Brian