I've got the Corsair Carbide Air 540. I am planning to face the exhaust for my cpu cooler towards the top if i can get more fans. I am looking into the corsair website to purchase fans the case comes with to match all, and i dont have an option to purchase the fans that come included http://www.corsair.com/en-us/carbide-series-air-540-high-airflow-atx-cube-case . Case comes included with AF140L. the website only has these fans as options http://www.corsair.com/en-us/cooling/fans . Are the non L fans the same? whats the difference? Second, I also have the Noctua NH-U14S cooler. I was thinking of buying two extra fans from their website to put for the top of the case. Which would be the best to use? 
