[mch62 (Mark)]

Ok if your after a tracking mount for the long term and an 200x1200 Newtonian you would be better of with an HEQ5 or better still an EQ6 to this add the OTA that you want.
The EQ6 will handle up to 18-25kgs with OTA's to about 1500mm long and aperature to 254mm or 1200 x300mm.
Any longer than this and the torque becomes to much for the gear train.
With a 200x1200 OTa it will be just cruising and provide a very stable platform .
As far as the OTA the GSO's appears to be the pick over the Chinese conterparts.
Andrews inSydney have a GS680 Dobsonian (200x1200) that you could use the OTA from and mount on the EQ6 and yes the f6 will be more forgiving for a newbie as far as collimation and eyepieces go.
He also has the EQ6 at a good price as well.

This rig will allow for added accesories as well as the future OTA upgrade if required.
Also the EQ6 can be upgraded to Go-To as well.
The EQ6 is a popular mount with many after market add ons available.
The EQ5 would be pushing the limits for that size OTA.

Andrews has another brand of mount (SV2) for sale but have not been able to track down a lot of info on the them , no info on specs or reviews ect on the web.
He states there better the the Eq's but i don't like the uncertanty.
i have an Eq6 and for the mony there very good and with a little work are an excellent mount.

Mark