Personally, if I had the money to spend, I would pick a game that has game play that you find compelling and pay a custom artist like Dirty Donny, Zombie Yeti, or Brian Holderman to create a one off art package with a theme that is your own.

I work in custom one off fabrication and can attest that my clients find the journey of inspiration, following along during the fabrication process, and telling the story as they show off their creation to their friends, to be one of the most rewarding experiences.

Why pursue a holy grail that others can also possess? Build your own!