Hi girish925,
It depends on the purpose of your usage, If you are looking for normal daily usage I'd recommend WD Blue as well. But if you just want to store the data, then I'd suggest to go for WD Green. Here's the link below for comparison.
Whoa,i keep hearing about it on the forums but never seen one anywhere.
Do keep us updated with it's performance after a few months,specs and price seem to be good.