I disagree with a pure POS model. Sure, Pure POS would be great for people like me that have boatloads of coins, but it's bad if we want to grow the community.  Mining is the engine that drives community growth. New miners discover the coin, mine some, and support the coin now that they have acquired a stake in it's success. Without mining the coin would just be in a perpetual state of stagnation whereby only current coin holders gain interest and everyone else is shut out. It would be the worst possible scenario for a "fun, newbie friendly" coin like Nyan.  For this reason I prefer the hybrid x-11/POS option.