No idea on "best looking scope". Sorry!
The rig is a little expensive, but not horrible. It will not interfere with your iron sights, at least it doesn't on my Steyr Classic II. This is how the system works:
Basically, you have two pieces. The base, and a second piece where the rings attach. That's the key.
Assembled, you put the scope with rings into the base, and turn a lever 180 degrees. You have positive lock, and it always returns to zero. If you get a second scope, you get a second piece with the rings, and then you can interchange them at will. Both scopes hold their zero.
Now, here's the cool part: there are two separate bases: the "Basis", and the "Vario". If you have a second/third/ whatever rifle, you get the Vario base for those rifles. Then, when you're setting BZO for the second rifle, you adjust the BASE, not the scope. So your scope is set for the first rifle, and when you interchange the one scope between the two rifles, you adjust nothing. Scope stays set, bases stay set, BZO is constant. You can have 100 rifles and one scope, and switch them between whenever, or you can have 100 scopes and one rifle, but you're never adjusting the scope once it's set.
As far as cost, it depends on which rings, and which base. You need both parts for the first rifle.
Dentler Montagen, Repetierbüchsen, Ersatzteile, Waffenkoffer & Futterale, Gewehrriemen, Läufe, Magazine, Schaftkappen & Handstops und Waffenzubehör im Jagd Shop – Dentler Montageschiene, Repetierbüchsen, Ersatzteile, Montageringe, Gewehrriemen, Langwaffenfutteral, Langwaffenkoffer...
www.frankonia.de
I'm not affiliated, and not a salesman for the company. Just a very happy customer.
The one thing I don't know (and worth an email to the company) is if they have the base for the Model 70. They should, I just don't know.