I have given up on trying to find the holy grail of SB boards. You just have to decide where you want to compromise. A few observations this season:
Amplid Surfari is my daily driver. A great all around board that can ride powder and bumps. Carving performance is above average.
Fullbag Diamondblade is a better carver. I can ride it in bumps, but it's more work than I prefer.
Coiler Contra (@crackaddict's board) is the best SB carver I've ever ridden. Didn't try this off-piste, but suspect more compromises as an all-rounder.
All ridden with Malamute boots and Now O-Drive bindings. Not as stiff as Jame's boot/binding setup, but above average stiffness, and I feel it's versatile enough for any style of riding. The board is the main differentiator IMHO.