Well, I guess if you are getting an OTA update then I proceeding with it will the best option as this will bring you are number of bug fixes updates, features etc. One more thing I don't think you will be able to update your device as you said you are rooted user but I would say try giving it a shot if the updates then it would be the best thing and one more thing if it updates you will not remain rooted i.e you will get unrooted.