I have an ASUS Striker Extreme with a Q6600 (stock cooling). I am not overclocking at this point, but when I do in the future, I will buy a better cooling system.
Right now, I need case fans that are temperature controlled..meaning they run faster when it's hotter, and slower when it's cooler. The case fans that came with my case plug directly into my power supply (which I don't like because it uses the big 4-pin molex connectors). Plus they also run at one speed when in this setup. I have the Raidmax Smilodon case and the 80mm fans came with them.
My motherboard has inputs around it for 5 optional case fans which use a small 3-pin connector. These can be controlled automatically by the temperature sensors.
What type of fans do I need?
Where can I get such fans? Any recommendations / advice?
Sometimes the different types of fans that you listed are more marketing hype than truly related to performance, while sometimes they do tell the difference. All i can tell you is i know which fans and manufacturers make quality fans, those include Scythe, Yate Loon, Panaflo, Sharkoon, Silverstone, Zalman, and some others but if you stick with those you'll be doing just fine.
I thought it was more important to get the hot air OUT than to get cold air IN. This is why I was thinking of having the side panel fan on EXHAUST mode. Air can always be "sucked" into the computer through the front or anywhere around the case that permits it if there is a pressure difference. What would you do????
Also, I got a 3-pack of Ultra fans for round $15 and they work great! My motherboard controls them by adjusting the voltages to the fan.
Like i said it is typical that the side fan blows in cool air, mainly on the graphics card but also the motherboard chipsets. There are different setups where you can force a positive or negative pressure in your case but typically you want the most balanced level of air coming in and air going out for optimal performance. I would advise you have the fan blowing in.