Originally Posted by
Kegan
Its good to pull air from the ground, there is a lot of dust there but most cold air is at the ground. I recon your new case will have good dust filters, just pull them out and clean them every few weeks.
You should exhaust your CPU cooler to the back and not up since heat goes up already, so if you let it exhaust to the back it will have more room. Your top mounted fans will pull away a lot of warm air from the CPU to so its more effective like that since it rises.
Side mounted fans can help dragging in cold air on your GPU's, especially GPU's who aren't reference designs can benefit from this as they dissapate their heat into the case.