When buying a sound card you want to look at what your budget is and what features your need/want. For a low cost, but great sound quality sound sound, I recommend the Turle Beach Santa Cruz. It's a really great card with awesome drivers that can be bought for only $69 from newegg.com. If you plan to use your sound card to hook up to a receiver or just want some other functions, then the GTXP would be a great choice also. It has about the same sound quality at the Santa Cruz since it uses the same audio processor. The GTXP has an external rack that has just about any audio input or output you can care to have. It also has really great driver support and if you wanted to, you can get a extra speaker and have a 6.1 setup with your Z560's. The GTXP will cost you about $125 shipped from newegg, and is a really great deal compared to the creative audigy at $200-$250.