Jay, so you don't get confused about the quality of the different brands, the Skywatcher and the Orion in your links are the same scope. So is the Saxon, and half a dozen other brand names around the world.
All made by Synta in China, painted different colours for each company and then the name printed on them.
To start on your Astrophotography path you will be happy even starting with the famous ED80.
Better to save a bit on the scope and spend more on a mount
Throw it up on top of a HEQ5 or an EQ6 and you have a great setup.
Try not go as low as an EQ5 if you want to do great Astrophotography.
You can sometimes get great prices on package deals when buying mount and scope together.
Keep an eye out for second hand mounts and scopes.
The prices for
NEW are:
(Andrews) in Skywatcher section:
ED80 - $899 with Tube Rings and Dovetail bar
ED100 - $1199 with Tube Rings and Dovetail bar
HEQ5PRO SynScan "Go-To" - $1199.00
EQ6PRO-T SynScan "Go-To" - $1499.00
Bintel currently have an ED80 for $599 !!!
HERE
but it doesn't say if it comes with tube rings and dovetail bar