I recently purchased a Dell Studio XPS 435MT with a 300+ watt power supply, which I feel is not sufficient for future upgrades. The power supply has all SATA cables for the HD, DVD reader & DVD ROM, along with an extra unconnected cable marked P7. This power supply does not have a 4-pin power cable needed for the Asus Xonar DX audio card which I just purchased. What replacement power supplies do you recommend which have a 4-pin power cable long enough to reach to the other side of the case where the PCIe audio card will be installed. My emphasis is on quality sound and I will be converting my vinyl LP collection to CDs & MP3 files.