35 idle is good, but a 57 degree load is a bit high.At max it should be around 42-47 degrees celcius.Thats where mine is at, and it's overclocked!
As long as you're not running benchmarks all day or playing Far Cry at max settings for 6 hours, I doubt it will overheat, just make sure you have adequate ventilation in your case.
You haven't really told us what kind of processor it is(Intel,AMD)
It is typical for Intel's to get high temps, AMD's are cooler and are a little more overclocker friendly.
hope this helps.