I have been lucky enough to upgrade to a more powerful Mac. Can someone please advise me on the best settings for Kontakt 2, re. latency, buffer size, etc.? And also the same for Garritan PO and East West Gold players?

my specs: PowerMac G5 Quad (4 x 2.5 GHz processor, 4GB RAM) 2 x 250gig hard drives.

Using: M-Audio Firewire Project Mix I/O as audio card.
Mostly with Nuendo, Cubase SX and ProTools M-Powered.

Many thanks in advance to anyone taking the time to reply ....