"Best" will depend on who you talk to... what their preferences in a ring/base combination are.
I can tell you that dual dovetail Leupold rings and bases, correctly installed and the rings lapped are an economical and extremely solid trouble free way of mounting a scope and not marking the tube... I highly recommend that system if you don't need quick detach/attach your scope.
They make a clean looking mount. Here is a picture with them on a 700. Medium rings and a 3.5-10x40.
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Leupold DD used to be my choice but now for most rifles I prefer Talley lightweights. You may not get ringmarks from DD but you will get rust marks![]()
Leupold DD used to be my choice but now for most rifles I prefer Talley lightweights. You may not get ringmarks from DD but you will get rust marks![]()