Why are you replacing the SL? Something you don't like, want to see different, worn out, or just tired of it?
Stiffer than SL is Heritage if you want to stay with NS
Big size range in your quiver...
Yes big size range, though I felt like I could go with a longer board for freeride, and a shorter one for a park/flatland board. I'd typically ride 150-153 for an all mtn board.