Is it possible to set the formatting of the Reputation number's text separately from that of the rest of the site? If so, it may be worth trying to see if you can find some sort of formatting and colour scheme that will complement the green bars of rep. That way, you could put the number after the rep in parentheses (as per option 2, which was my vote, anyway). This would make it easily accessible and potentially intriguing to the new members and make the rep more visible to existing members (which could provide a more forward sense of recognition and healthy competition). Formatting the text in a way complementary to the bars would cut down on clutter, though, as they would mesh well with the bars and could be viewed as a single unit made of two separate entities.

-asp