MPC60II floppy disk question

I know you're supposed to use 3.5 DS-DD 720K Floppy Disks in your MPC60's original floppy drive, and my question is do I need to get the disks already IBM formatted or unformatted? Here's the link to a store that sells both and I wanted to make sure before I bought the wrong kind:

http://www.floppydisks.com/items.php?itm=5&pgnum=1

Doesn't really matter, you want to format them disks directly on the MPC60 to avoid trouble. At least that's my recommendation..