What about this:

1 Bitcoin = 1 GigaBit

e-0 GigaBit
e-1
e-2
e-3 MegaBit
e-4
e-5
e-6 KiloBit
e-7
e-8 Satoshi
e-9 Bit (not currently dividable but maybe in the future)

People are much more used to the large prefixes than to the small ones.