Sorry to disappoint but you're not going to get excellent optics for $1000
as you're into photography you'll appreciate that quality optics comes at a price.
You could get decent quality but you're really on the cusp of getting more interesting options once you go over $1000 (as a general rule), like triplet apo refractors. Visually a 8" Dob should be in reach, but it's not particularly compatible with imaging. Usually the requirements that make for a good visual telescope are at odds with those that make a good imaging scope, but not always.
IMO as you're into photography anyhow I'd focus on getting a decent equatorial mount first, like a HEQ5 for example, as you can readily mount your camera and any telephoto lenses you already have onto the mount. Then when funds allow you can get something with more focal length. Don't forget to check out the classifieds.
It also depends on your interests, as astronomical objects come in all shapes and sizes and no single telescope frames them all well.