It's always a good idea to host your domains separately, i.e. away from the company you're using as your registrar. Godaddy is great as a registrar. I've never used them for hosting purposes, though. As for HG, I did once have a blog hosted on one of their shared hosting packages. Never tried their reseller hosting. I would recommend that you try it out for yourself if they have a money back guanratee. That way you can get your money back in case you choose to not continue with them.