I have previously found this site (Same one as the one posted for OTE150 mount) has the weight and other specs for GSO and Orion dobs.
http://www.telescope-service.com/dob...start.html#gso
The 10" GSO Tube is 15kg, the 12" GSO tube is 19.5Kg
I too have been looking at EQ mounts to suit my 10" dob for a while.
Regards