Welcome to the empeg community. From a different thread, here are my photos of Filener's lenses and the original lenses.

And I second what SE_Sport_Driver said. If you are just starting to rip your CDs, just get one 80 gig for now (better price than the 100's) and get the second 80 gig when you need it. The price will have gone down by the time you buy the second.

You should probably not keep using your 10 gig along with your soon-to-be-purchased 80 gig. When you swap out the 10 gig for the next 80 gig, you'll loose that 10 gig worth of music. And the empeg doesn't put specific songs on specific drives, so you'll probably loose half of every playlist when the 10 gig comes out. At least, that's how I understand it.