Originally Posted by Bob Ross

If you can still find a Sigma BC906 buy it. (Or, tell me about it and *I'll* buy it!) The most elegantly simple cyclometer I've ever come across: Easy to read, doesn't have anything you don't need but does have a couple things you might not know you need until you realize it's there, and you could get them for <$25 when they were still being made. Which, sadly, they're not. But I'll bet someone has a couple left in stock.