[BTW has anyone got some photos of what I can expect to see through the 10inch Dob?

[/quote]
Here's an article from cloudynights that shows some drawings of DSO's.
http://www.cloudynights.com/item.php?item_id=808
You'll probably see more through your scope unless you have bad light pollution. From a dark sky site you would see a lot more detail than is shown in the drawings.