I've used the Pentax 20-60x80 ED for a year and it is awesome. I went to the SHOT Show and studied spotters and for the money the Vortex Skyline 20-60x80 ED can't be beat. I have one and do comparisons all the time with other spotters and really love the Vortex. I am able to fine tune the focus better than with other spotters so in the end I get a better, crisper image. That is my complaint about the Swaros is trying to get that really fine focus. The Kowas and Zeiss with true Florite glass and their fine focus are the best in my opinion but for the money the Vortex 20-60x80 ED can't be beat.
I haven't yet been able to try the Vortex Razor but I plan on it. If you are wondering if the Vortex will hold up to abuse, me and several of my my guide friends all use them and they ride in the back of my four-wheeler pack and it keeps on going.
Rod