itunes backup suggestions


I use a Mac mini with an 1TB iomega external hard drive using firewire. I want to be sure that I have the iomega all backed up. What do you suggest?

Apple Time Capsule looks great but at 1TB it seems like to much money for something that will be used up soon.

Apple Airport Extreme with a inexpensive 2TB drive

or can I just use another iomenga Mini max hooked up to the current one via firewire and be done with it? These drives are so inexpensive..

Thoughts?
iwalker182
I'm confused now but OK....

I thought I could just get a 2TB drive connect via firewire and be done with it. I would want an exact copy of the first drive. No?
The first time you backup using time machine you need to have plenty of space on your new drive. If you fill a 1tb drive up to its limit and then buy a 2tb drive you may not be able to even use time machine for the initial backup. This is a time machine shortcoming. This is where superduper is a life saver.
I am on an older G5 mac. not running time machine. I also use SuperDuper with a pair of OWC 750GB FW drives. And like Drubin, I keep one drive off until I do a SuperDuper backup. Its a single click after setting up the type you want.

synthfreek speaks the truth about the extra space needed for buffer with time machine.
The other problem with Drobo is its slow. I have it set up with 4 1tb 7200rpm drives on a Dual Quad Mac Pro with 5gb ram and could not get it to work with firewire 800, had to use USB 2.0. I like the capacity and seriously needed the backup for my images but don't know if i would go that route again. Customer support was okay.