i have a S&B 12-50x56 its optics is the best. But the scope have no eyerelieve after the 3rd time it hit me i taked it of.I bought a March 5-50x56 it is a fantastic scope, not the same as S&B in optical quality but close.The March have plenty eyerelief and extremly good tracking of the turrets.Another thing that is a bonus the March have a far greater field of view than the NF12-42x56BR telescope. If only the S&B had beter eyerelief.
The S&B 12-50x doesn't have as much elevation change either. Plus I noticed the eye relief . . . that sucks. I'll either go with the March or drop down in power to 25. I still have a quite a few months before I have to decide so I'll also wait and see what's new for 2013.