SB starts to throttle mid 90's. individual cores can go to mid 90's with the recommend < 80C.
From what I've read SB is easier to OC and Not as sensitive to voltage (SB - Max 1.5, recomended <1.4V).
Upto 5.0 with "Good" Air. My self, Upper 50s -> Low 60's @ 4.6 W/Zalman 9900 Max