I didn't click the links provided, I assumed the Celestron was a dobsonian mount as well. Given that the Celestron is an EQ mounted scope, I'd definitely go with the Orion. The dob mount is very stable. There's no guarantee the EQ mount on the Celestron will be stable, and mounting a 10" reflecting scope on an EQ mount can be a set up for instability issues, esp. considering the price of the Celestron mount in question.

If you have astrophotography ambitions, get the XT for now and learn the sky and astronomy. Then get a dedicated astrophoto rig when you feel you're ready to take the plunge.