Lt.., Out of your options I would go for the Dialyte for the optical performance; however, I'm not a fan of the design. It is supposed to be a sheep hunters scope thus the design. I would say no to the 50mm Razor, I don't like the edge quality. Edge is better on the 65mm Razor and that is a good option, however I would compare it side by side to the Viper. I have said this in the past but with Vortex it is a scope by scope comparison that you need to make and not a model to model comparison, so I would check out both your take home options and then make the choice if you decide to go with a Vortex.
When it come to he high end optics I like the Leica 65mm best.