You could make good arguments either way but X240 snow has great reviews. I have used three of those in builds you’re getting two for one at $54 with free shipping. You are using natural ventilation do not only cool your CPU blow that hot air right out of the top of your computer that heat from the CPU is being bone directly back into the case you may have a pointed at your exhaust fan, but there is still here that would not otherwise be there

In my humble opinion

And I understand the air answer may be good for 10 or 12 years, but for me personally getting the next best thing every other year, so it really doesn’t matter may not be the right answer for everyone but it’s the right answer for me