That's a good option. Glad to see the mounts are not overhanging the ejection port or over the receiver like some mounts do. Those look like dog schidt. Don't know why anyone would do that to a rifle. Especially a nice one like a supergrade. I don't have any supergrades, but have plenty of Winchester model 70's of different vintages. I also like a steel warne style mount and Burris Zee rings. They are very strong and keep the scope where you want it for as long as you want it. Those and DD's are my pick, even though some of the other options may be a hair nicer. Here is an example of what I mean by a hair nicer:
Those are Conetrols and they look great in my opinion. However, they are a biotch to install. They have a bunch of small pieces. I ended up selling these and going with the tried and true
DD's, which are a better bang for the buck IMHO. The Conetrol rings and mounts are similar to the S&K mounts and rings in looks, but use different parts. The S&K are kind of weird as well, as they use a strap type top ring, that can wear out over time. Ask my buddy that had a set and recently threw them away because they no longer held the scope securely. The scope would move under recoil. My buddy thinks they just wore out because he had removed them and stretched them out too many times. I can't say for sure on that one.
So, I like your simple weaver style bases and ring choice. They work well and are generally my first or second choice when scoping my model 70's. I'll use the steel Warne (weaver style) or steel leupold QRW/PRW bases though, as they tend to look a little better:
Here are some steel Warne bases with Burris Zee rings on top of my pre 64 338wm. Rifle weighs 7 pounds and those rings hold that scope very well:
Here's a newer mauser rifle, I set it up with gloss Burris Zee rings to go with the nice blued finish of the rifle:
Kind of similar to what a supergrade finish may look like. I have many other rifles set up this way, so I agree that these are a great match. Look great and are also very strong. Hard to beat for the money.
Leupold DD's: