5900 RPM western digital HDD drive - query

[bcdxer]

i shortlisted below for my need...
WD Caviar Green 2 TB Desktop Internal Hard Drive (WD20EARX) | Internal Hard Drive | Flipkart.com

Can i use it as my primary drive?
Some said that 5900 rpm drives are not suitable for primary drives..........

 

[Skud]

Not much difference in performance between green drives and normal 7200rpm drives.