I keep looking at the Warthog, but I can't really justify the price at the moment. It does seem like one of the better options, though I seem to remember there's one weak part in the design that may require replacing after a while? You may want to do a web search first to check on that before buying one.
I've been using a $30 Thrustmaster cheapie so far, but the dead zone is big enough that it doesn't really allow fine control.