The 120 mm rotates faster. So it would be better right ?
IMHO, CFM more important for a "case" fan and H2O pressure more important for a "rad" fan.
RPM is probably not so important.
And where can I find scythe fans ?
I could not find any locally (Kol). KAMA available at Prime.
Also at eBay. [Expensive].
If you have folks abroad, try obtaining Scythe Kaze or Delta fans.
I read good reviews about the 120mm one. So I am about to order it.
ORDERED.
The CM R4s are one of the most commonly used 120 mm-s here in India, I think. (which is primarily due to availability rather than anything else I guess).
Don't worry too much, these are not bad.
Hold on - I could connect it using a 4 pin molex, right ?
Both fans I linked to on Flipkart come with 3-to-4 pin connector.
On the site its mentioned that it has a 3 pin connector. Does that mean I ll have to use a 3 to 4 pin converter ?
If you have free 3 pin headers, then no, else yes.