Well i think that an question like that is hard to answer ........

i dont know what happens with your system if you share an amount like that, and if you do, do you have an fast inet connection ...

iam running limewire with ubuntu , i have also used phex and gtk-gnutella .

i thought gtk-gnutella come also with no gui i believe, but iam not sure about this .

guess just try some clients ..........