In my experience for price and quality the Sightron is hard to beat, I have both the SII and the SII Big Sky and as much as I like the standard SII, the Big Sky is much better. You didn't say what power you are looking at but the 6x24 Big Sky has 60 minutes of windage and elevation and the 4x16 has 80 minutes. For hunting I like the 4x16 (most of my hunting rifles wear a SII 4x16x42) for target I like the 6x24 but I think I would rather have a SIII 8x32x56 but it only comes in center dot crosshair which I don't like.
I did have occasion to use the warranty on one Sightron scope and it was very painless

.
James