I don't generally do reviews (mainly because nobody sends me game to review...), but I have two games to recommend:
Second, I've also been reading me some Adventurer Conqueror King the last few days too. As a genuine attempt to expand OD&D's "end game" into something interesting in its own right, I think it would be hard to better; and furthermore, as an application of real-world economics, history and sociology in playable form I think it's beyond reproach. I'm not a huge fan of some of the modernising elements when it comes to character creation and game mechanics, but that's a matter of taste. It's certainly the best thing since Birthright at answering the question: "What do I do with all these gold pieces now?"
Try them. You might like them.