I'm a newbie buying gear for participation in F/TR. I've got most of the shopping list ticked off, but a few items remain, including scope base and rings. I hear a 20 MOA ramp is a good idea for long range, but after that I'm lost. One piece, two piece, manufacturer X,Y, or Z, and so on. I'd like something to fit a 30mm tube. Quality without going nuts would be nice too. Any thoughts?