Aircooler is a rip off. $100 for a single tower dual fan config? HA. Noctua will something to say about that... I'd rather spend the extra few dollars for a NH-D15.
Corsair is basically charging full price for the ML fans then taking the $30 left over for the heatsink then probably $10 for RGB. The fans are more expensive than the rest of the cooler(yes I am exaggerating).