How much heat do 7200 RPM drives generate?

I recently ruined my laptop hard drive and need to replace it. My laptop already has some heat problems, so would getting a 7200 RPM replacement instead of a 5400 RPM be inadvisable?

HDD's run fairly cool, My Samsung HD is at 32c without any ventilation with a 22c ambient.
So it probably wont make that big off a difference.

Depending on your operating system the more memory you have the less your drive will need to spin. =less heat.