I like this idea. Even if we only assigned one prize this way, I think it would be better.
Also, to mention Josh by name, that Dreadnought list is as much fun as eating glass. I like playing with Josh, but that list isn't a game against Josh; it's just figuring out how to beat the list, which just plain isn't fun. And Nick shouldn't ever bring his stupid Leafblower army again, for the same reason.