I want to buy an external hard drive for backup purposes. Both are 120gig. The two choices are Maxtor OneTouch Personal Storage - 120GB and Iomega HDD 120GB USB 2.0/Firewire Hard Drive. The Maxtor is about $30 more. Which one would you buy? The Iomega has Firewire and USB. The Maxtor has USB only, but has 2 meg cache. The Iomega has 1 year warranty. The Maxtor has 2 years warranty. I am looking for reliable storage. Any thoughts?