Name of the rating: I've actually been thinking about this for the past few days and haven't been able to think of a fitting name. "Winner" keeps popping into my head, but that's already in use...
Explanation: It's basically a "like" or "Winner" rating, but with a twist: You can only give one every month/two months. I feel like this could be a very nice addition. It would mainly be used when someone's like: "Wow, that's literally the best thread I've seen in a while", or "This map looks awesome and it HAS to get accepted." etc. The rating wouldn't be used too fast I think, as you're only able to spend it once every month, so you really want to use it on something mind-blowing. Kind of like the ERMAGHERD-rating, but for normal members. Hey, I'm bad at explaining stuff, but I hope you got what I mean.
What kind of icon should it like, awesomley, have: Great question.
Why the rating is totally needed, dude: Would just be a really nice thing to have imo. I imagine someone would most likely be very happy when they see one of their posts received this rating, and of course it can just be useful when you think something's really cool, but you just feel like a "Winner" or "Like" won't do it!