Sound blaster Z vs normal XFI Titanium (not the expensive HD one) which one is better ? Is it worth the upgrade and can you hear any difference ? I am planning to use it with my Creative Megawork 5.1 speaker. Thanks for the advice. I saw the Cirrus Logic chipset on Sound blaster Z only support 2 channel sound output what happen when I use it with 5.1 speaker will the sound quality still be the same ?