Well lets see, the winner could be the person with the most snobby posts. Or it could be the one who posted the most vintage suggestions for a new member looking to buy a turntable. How about the member who posted the most comments like "Snake Oil", or "Diminishing Returns", if you get my drift. Or their sure is a lot of post now about "I don't get this band" trying to think of how we can incorporate that.
Now seriously:
How about a photo contest, the best photo of gear and you could have members vote the photo by the most likes. Of course I will give everyone a "Like", as long as they each send me a first pressing of a like new mono Blue Note.
Now if its all about music, we could have members post a picture of their favorite album and the one with the most likes wins, be could we not allow Dark Side of the Moon, or Brothers in Arms?
I can suggest more ideas but only if I get 20 likes from this post!