Depends on what you plan on using it for what's best, and on which platform have you've been working the most. For exchangability with your normal computer it's best to choose the same platform. Ofcourse you can exchange data crossplatform, but it usually takes more effort.
all double dutch to me (no pun intended
)
I want it for holding music to transfer onto the ipod and phone etc.. and just basic home use(dvd playing etc) as i dont have a home computer...