Avoid the Saxon. The arm isn't strong enough according to many reports on CN of the same mount under a different brand (e.g. Astro Tech Voyager 2).
The Skywatcher AZ5 can be bought with a steel tripod from Astro Anarchy or Andrews for less than $449. One minor issue is that the azimuth slow motion control points to the left instead of towards the observer, assuming you're using a refractor or 'Cat'. For a short scope like the ED80 you should be fine but with a longer scope you wouldn't be able to reach the control.
http://www.astroanarchy.com.au/Mount...nlessLegs.html
The Skyview comes with a weak aluminium tripod but it takes a 10mm bolt so can be attached to a Vixen/EQ5 type tripod if you remove the alignment peg.
Overall the Skywatcher AZ5 with steel tripod is the best value.