if the vortex Diamond back is on their radar why wouldn't the Argos be? especially if they are looking at he Viper as well the Viper is heavier then the Argos.I don't think a budget 85mm that is ~70 ounces (Argos) is on the radar for many Rsliders. Lot of weight and bulk to pack, with suspect optical quality. However, it could be OK for some people, especially with realistic expectations and uses, plus a good sample if such a thing exists with that make/model.
I have looked through the SX scopes but have zero experience with the Argos. I have tried a couple Ares and was not impressed but am primarily interested in high resolution.