The (Skywatcher) flex tube DOB is far more portable, and when folded only looks like "half" a water heater.
And you can get these as GoTo.
Newtonians on an EQ mount are suitable for astrophotography I believe... but they can be a "pain in the neck" for visual.
The EQ6PRO is a very good tripod, but it is big and heavy.
The OTA is easily removable from it.
Portability is not a word I would generally associate with it. (It is designed to be stable and to hold steady a big Newtonian in weird angles after all.)
And at the end of the day, you still have a solid tube Newtonian plus a big mount and tripod to store.
Cut to the chase, yes the 8SE is a good scope, a lot more portable, and has goto, but you won't see half as much as you can see through your GSO 12 DOB. If you can live with that, that is your choice.
Good Luck with your decision.
In the meanwhile, keep enjoying your DOB.
(and yes, a Red Dot Finder is an essential extra (IMHO).
