After much talk, my husband had a vasectomy. It's easier (a few hour surgery, a couple days recovery) and less likely to have to worry about a tubal pregnancy.
I do not know your relationship status, so that would be a big factor.
My husband is only 36, and we talked long and hard about what it would mean if something happened to me and he met someone a bit younger who wanted kids. But in the end, it's what worked for us.
My guess is they'd want you off a biologic for several weeks before surgery, because of the risk of infection and also the risk of not clotting as easily. But I'm not sure.
Best of luck with your decision. Consult your rheumy about it.