So my question is this. In your opinion, is a non-decimal, vaguely accurate coinage system (but not too complex!) something that can enhance a game, or just a pain in the behind?
I'll answer the question with a couple of questions: Do you find balancing your checkbook to be entertaining? How many of your players go, "Oh, yay! Coinage conversions! This is what I wanted to do after a long day at work! I'm glad I got a babysitter for this!"?
I think that illustrates where I stand on the matter.