Thank you for your replying. I live in Argentina and i don't have many options. For example, these ones costs me arround 20 usd dolars each, while a Corsair HD Series is 40 usd.
Also, i clarified that i was looking at the SP120 on the corsair website.
The thing is that i don't know if those Corsairs are good quallity fans, or if they are much better than the ID-Cooling ones.