From what I've read and heard (I live in Boulder, CO which is basically the mecca of weed), the oils don't give you the high that other forms of mj do. Apparently the topical forms - oils, creams, etc. cannot cross the blood brain barrier, so even if the strain does have THC in it (you can get some that are pure CBD with no THC at all, and those are legal in all states), you won't get high.
For some people this isn't good because the high helps them with the pain, but for others, like me who hate the high feeling, it could be a great alternative. You still get a lot of the benefits and pain relief, you just don't have the associated high.
I haven't tried them yet personally, so I don't know a brand to recommend, sorry :( Hope you find something that works for you!