Well I just had a quick browse in Google, and came up with this: http://www.skywatchertelescope.net/EQ6.html
It will easily handle refractors up to 200mm and classic Newtonians up to 14" in aperture.
So I imagine there would be no dillemas with throwing either the Guan Sheng GS-980-BK7-CRF or the Bintel BT-302 onto it? (both are 12" dobs)
I just want to know if i'm on the right track so far... :S
Cheers.