Originally Posted by pylkko

First, I would like to reiterate the already stated: make sure that the ventilation is not clogged. I have seen laptops run at at temperatures near 100 °C on heavy load, but once the ventilation was cleaned drop to 40-50 °C. Dust just gathers into the ventilation paths and when this happens for years you end up with a system where the fan does not push the air through it efficiently. Another trick is also to take out the fan and lubricate the axle.

But, it is also true that many laptops are not designed with heavy use in mind, and you might have other reasons to want to buy a new one. I'm my experience Asus is OK.