I've set up everything, got the graphics done and everything. It would be a pain re-naming it. Maybe alternative Domain names like Promotion-box.net, etc..
I would go .org if you don't want to make a bid, which potentially could still see you not get the domain. You should do fine for now, as they are parked, so there won't be a great amount of traffic to them.
Adding "the" to the front has some impact, though not a lot if you market it. It just makes it longer and longer which is not desired. Though it has a .com which is generally good for forums.
But then again, surely you would have set that up and made sure before the graphics etc. 😕