I have been running an exit relay from my home for many years with no issues. If you are willing to support the ideals of the Tor project, you should be willing to run an exit relay. Obviously, without exit relays, the Tor project would be useless.
I am unable to surf to exactly one site that I know of, a hosting provider. I solved that problem by choosing another hosting provider, Amazon Web Services (AWS).
If you are ever blocked, it is easy enough to rent another IP address at AWS for $7 per month by signing a one-year contract for a reserved micro-instance. Then run a squid server on that micro instance and use it as a proxy server. But as I said, this hasn't been a problem for me.
Also, keep in mind that running an exit relay from your home will provide you with better anonymity. If you combine that with surfing using the Tor Browser bundle, you will have pretty good anonymity. (I read that once on the Tor project's site.)
Regards,
Harold