Hardrive for a 24x7 on nettop

Hello Everyone!
I am building myself a nettop to use as a 24x7 download machine. This is the motherboard I'm using.


ZOTAC IONITX-T-U Intel Atom D525 (1.8GHz, Dual-Core) Intel NM10 Mini ITX Motherboard/CPU Combo


http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Here's the case I'm using.


M350 Silent Fanless VESA Mount Enclosure Mini-ITX Case
http://www.ebay.in/itm/M350-Silent-Fanless-VESA-Mount-E...

I need it to be as small and silent as possible and so I choose the above two stuff. As it is only gonna be used for downloads I went with that motherboard (Need the wi-fi!).

I'm looking for a 750GB HardDrive for it. Can you guys help me out please? I'd be more than happy if you guys take over and select one for me and give me the newegg link   My first time building something and don' want to mess it up!

Thanks a lot!