Weaver makes a mount that doesn't require you to drill/tap the topstrap of your gun. Have no experience with it but others report they like it. The really good mounts will require drilling and tapping the topstrap to use the mount, but they offer a much stronger, more solid hold. Examples of drill/tap mounts: http://www.jackweigand.com or http://www.egwguns.com both offer rock-solid scope mounting platforms for Ruger revolvers, as does http://www.sskindustries.com with their TSOB mount. If you were to have located a Super Blackhawk Hunter model, you'd already have the mount that comes with that model.
Scopes would be a personal choice between a regular scope or a red dot of some kind. Experimentation on your part is the best way to find what works best for YOU. What suits one person may not suit you at all. Try some different models if you can before you buy. Congrats on your new Super and good luck with it!