I think an EQ6 will be overkill when it comes to a 6" Dob and maybe one of the smaller better quality Go-To's might be a better choice.
When you get a bigger scope you may keep the smaller set up as a Grab and Go for those times when you don't want to or can't lug a bigger scope around.
This is exactly what i have done.
I use to have a 6"refractor on it but that got traded in on the 80mm.
Won't be able to move the Newt soon.
Have a looky at my 80mm Ed grab and Go refractor on top of an EQ6 .
Like a pimple on an ant hill.
Does allow me the ability to piggy back extra cameras ect .
Still haven't tried it as of yet but that bright warm object in the sky has made an apperience so may be tonight
Mark