I just purchased a Lian Li PC60USB locally, and it has a top exhaust fan, which is the first time Ive seen this model with a top exhaust fan. I was wondering if the top exhaust fan is worth having since my main concerns are foreign objects including dust falling through the top fan hole, and the possible added noise from an additional fan since the Lian Li cases with just two intake and one rear exhaust fan seem to be pretty quiet. I don't do any extreme overclocking, only mild so was wondering if it's worth keeping this case or getting one without the top exhaust fan.