Hmmm, that is a crossroads you're at. A couple of ways to face it is 1) I just saved myself a hundred bucks. 2) I have insurance (homeowners or renters) so if it coughs up a hairball, I'm still covered. 3) I have no insurance, but I could get something cheap to cover it completely, so intstead of saving $100 it's only $60. I'm still ahead. hahahaha. 4) I just spent $xxx on a camera.
Think about it. Do the upgrade (if so inclined), buy the insurance (cheap stuff) and have a good time shooting your new camera. There is nothing wrong with refurbished gear. All it means is that somebody else upgraded and the factory re-certified the gear as good as new and you get a discount. (Respected resellers only apply)
Just my 2¢.