The original OP made the post back in 2012. Since then though there's been a plethora of other options. The Unitec SWAT series, Toast Pro, and most recently the Kenko Sky Memo S Tracker comes to mind (has a port for auto guider even).
Still sticking to the Polarie, here's the setup i've got at the moment :-
http://www.cloudynights.com/uploads/...912_289734.jpg