The list I provided has no bearing on the Canadian to US dollar exchange rate, that why it's USD, not Canadian.
As for the scope in question, I have no experience. I am looking at the Cabelas Covenant 7 and the Arken line up, primarily the EP5 if I go that route. However, by the time I'm ready for that, there may be something else out that I may like better.
I am looking at building an open class rifle. I havent decided if I want to build off of my CZ 457 or build another rifle and leave this one for production for my wife, while leaving her current rig for a loaner. It's a Savage MKII FV. It does well, but it's not in the same league as the others you mentioned, even though it is in the same class