i tend to try and stick to the cheaper and effective cooling units, im currently using 2 pc's my main machine is running Water cooling, but on my other as an alternative cooling, i have 5 fans total (not including cpu fan or psu fan) i find that air being pumped into the computer from the sides and air pumped out the back, it keeps an even temp in the pc, and i havent had any problems with it at all. (either of my cooling systems)