Thanks for your responses.
Zach - My GI says that there is not enough of a difference between 6mp and Imuran, and that 6mp would likely make me sick too. It does work for lots of people though, and it is definitely worth a shot before Remicade.
I should also add that I have a bit of a deadline for the Remicade. I live in Canada, and have been specially approved to get it, but the eligibility runs out in March. If I don't start it by then, and apply for the further doses if it works, then I would have to go through the whole approval process again - and I don't know if I would be approved later if I turn it down now. As it is, I will still have to pay about
$4000 for the treatments (whole cost is $18,000-ish).
Nothing like making such a decision on a deadline!