Hi Chris, I would go with the dearer newt (I like Newts). The tripod is heavier and seems to be higher quality. Same with the OTA. It also has a dovetail to afix the scope so you could easily swap with your ST80 if you wanted to. At 650mm fl very portable. I have a 5 inch newtonian for grab and go and love it. I use it more than my main scope.
Cheers, Richard