temps are pretty good. But the under load temp is more important than the idle temp. So keep an eye on that when oc'ing.
But if you want to then just try oc'ing. I don't think you will have problems with temperatures.
the BIOS isnt idle for some reason, it puts a decent load on the cpu for a reason that baffles even the likes of me. i say its about a 30%-50% load on the cpu while your in the bios. i would say idle his temps are high 20's to low 30's