My own experience: I bought an Orion 14" goto (XX14g) which uses the Synscan controller. The optics are great but the controller (and mount drive) not so great and I had some issues with getting it serviced. In the end I've pulled out the drive and have reverted the scope back to a push-to using the Argo which works a treat.
An option is to get the Orion 14" non-goto (XX14i) like Rick got (
http://www.iceinspace.com.au/41-651-0-0-1-0.html) and modify as required. You could even try an AstroDevices Nexus system on it.
*Note: It seems that Orion have updated their drive system on the scopes so maybe they have improved.
Cheers,
Simon