With the standard Vixen dovetail, my 10" GSO (ex-dob) is pretty wobbly on the EQ6 Pro. I have not yet gone the expense of robust 'D' sized from someone like ADM, so I can't comment on that. I went a different path for photography and bought a 2nd hand Equinox ED80 which sits happily on the Vixen dovetail.
I bought my EQ6 Pro (white) some years ago from
http://www.telescopeshop.com.au/p/34...g-payload.html in WA, even though I live in NSW because it was under $1,500, where it was > $2K in the east at the time. I see they are currently $1,595 but the advert implies the black one, so I’m not sure it would be go-to.
Bruce