my sis has a 40 gig ipod , my brother a 15gig and my mate an ipod mini
i bought an ipod mini too , after seeing just HOW small the mini really is !
it also looks much nicer than the ipod and seems much better made
plus , even after getting every van halen , queen , led zep , who and dlr song etc worth listening to i didnt get anywhere near 4 gigs
why do you need 20 gigs on the move anyway ?