for like $200 (not including shipping) you can find and buy a Digital Audio G4, Quicksilver G4, or even a Mirror drive door G4, and all 3 will outrun that B&W with the G3 1ghz or G4 1ghz upgrade. mainly cause of its slower system bus and its video being on a PCI bus,

if i was you i would leave the B&W as it is and buy a DA, QS, or MDD.

dont bother with the Yikes G4 cause its just a B&W with a G4 CPU and the ADB port removed.