Alienware Aurora r4 PSU change

Hello, since my psu is coil whining i would like to change it

i've been looking for a few psu's and found this one

http://www.evga.com/Products/Product.aspx?pn=210-GQ-0850-V1

is it good?, does it fit in the aurora r4 psu section? Will it connect to the plastic back the normal psu is connected to on the back?

Also i don't know anything about the sata cables but does it have as much as the normal psu i mean will it be able to connect to everything like it did now ? (only modif that needs more sata is adding two extra hdd/ssd's (there were spare sata cables)

and... do i need anything extra than this? (a few cables or something?

I don't wand to buy the same psu again because seeing how this one survived ...