i have ardy planned 2 grab Z5500 after CNY but unfortunately my xfi has finally died 2day after 5 years of blasting so looks like i need 2 buy the sound card first n Z5500 need 2 b delayed again i like 2 ask what is the difference between xonar d2x n xonar essence stx...can both sound card support Z5500???also i c there is xonar hdav1.3 which unfortunately looks like el cheapo creative style sound card with PCI slot