Edit: See below for update....
I've got a new team, pre-waivers, in Royals and picked up Herr in the autodraft. I've had reasonable success with Herr in the past, but Doran is on the FA table and I'd have a fair shot at him if I choose him on waivers. They actually seem to be pretty similar players and rather close in value, so it seems like a hard call. Either seems like a pretty good fit for Royals.
I've never used Doran before but I'm sort of leaning toward trying to get him. The argument for Doran would seem to be: 1) better range, 2) faster, 3) offense almost as good, 4) faster, 5) cheaper.
The argument for Herr would seem to be: 1) higher OBP, 2) better years are better than Doran's best years, 3) low errors.
To me, the Doran package looks a little better, especially since he costs less, but I'm wondering what your experience has been.