I think the Losmandy GM-8 has the same carrying capacity and tracking and PE as a Sphinx Deluxe, I did a thread reviewing goto mounts awhile ago:
http://www.iceinspace.com.au/forum/s...highlight=data
Personally if two mounts have the same performance and one is almost half the price of the other I'd be interested in it. Search for comparisions of the Sphinx Deluxe and the GM-8.