I'm planning a new iMac this year, and they don't have FW800. I've got two dual 3.5" bay FW800 OWC enclosures hanging off my current computer. I'd like to move my 4 drives to the new machine, ...

Picked up a 2 TB HD for use as a Time Machine drive, now need matching enclosure. FW800 enclosures seem to be somewhat rare and pricey, so I was wondering if a USB 2.0 would be good enough for that ...