Hi Allan,
There is a thread running at the moment that will give you lots of invaluable information regarding the complications of mounting a 10" dob.
http://www.iceinspace.com.au/forum/s...ad.php?t=66164
Getting into astrophotography unleashes a pandora's box, and if you are unsure on whether that's the road you want to take at this stage, I would advise you, no better - stress to you, that you keep it simple to start with. In time, you will find out what you want to pursue. When I first started, I had no idea I'd be getting into the things that interest me now. This is a journey. Don't stress on the future, you may actually end up throwing wasted money against the wind. This will not be the first scope you will get. Too many beginners think that way and over analysis their future scope purchase. Start simple, learn and progress, and enjoy the journey it takes you on- who knows you may decide sketching and staying visual brings you delight, or making important contributions for variable star observing is a lot of fun, etc etc. There is a lot of areas in astronomy - find yourself first.
Kind regards,
Suzy.