Hell, with a 50 rear, might as well go 39
I'm running a 32 XX1. I know I could push a 34, but I basically never spin out on the hard tail.
I have a 32t absolute black oval ring which is the equivalent 30t on the dead spot (top/bottom) and a 34t in the power spot. I was sold right away after riding it for a short time. Take a spin on one if you get the chance.