i see many available online... there is the WD black for 30k and its green for about 20k... there is the seagate 128mb cache es constellation but it is about 40k... then there are a load of lacie and WD external usb drives so there is a plenty of choice here. But the external drives aren't as reliable and fast even with usb 3.0... but my main purpose is storage... so which one should i buy? i could get two greens for 41k as well... what should be the best choice for me? my first preference is longevity followed by price and then speed..