Just picked up a Contour Shuttle Express. Everything is already mapped out in HDSDR. You can download my map file here.
So far i have tried 3 jog wheel/controllers to control HDSDR.
Logitech NuLOOQContour Shuttle Xpress
I like the Shuttle Xpress out of the bunch.
Look on E-Bay for really good deals on these jog wheels.