I just purchased a new Savage 12LRPV in 6mmBR. Now for the scope, rings & base. Use of rifle is varmints & target - 500 yds+ Scope more than likely NightForce NXS 8-32x56 Looking at Picatinny bases: Opticsplanet.net has a NF-MT-20MOA base for $114 - (steel I believe). I need advise on this: Any other bases? Better prices? Is 20 MOA enough (I doubt I would ever shoot over 1000 yds) Which rings & where?