Maybe just one more rank as a "very" far goal.
1000 - Forum Addict
The name is questionable but the idea is that 1000 posts are a lot of posts so no one will say 1 word per post just to get there. On the other and users that reach 1000 [usefull] posts deserve a medal.
Also, 1000 posts will take some time to be reached by some users so there is no need to think in a new rank for an year or more. When the time comes a new rank could be created at the 5000 posts and so on.
Just a final idea.
EDIT: 1000 posts is not that far. Go go
anda_skoa :wink: