I am not familiar with the Pioneer DV-578a. I am currently using a Pioneer Elite DV-58AV, with modified XLR Digital/ XLR Analog-SACD-DVD-Audio. CD sounds excellent through a STL DA-64XT Super. I have never been that impressed with 2-Channel SACD/DVD-Audio, especially the dual layer hybrid SACD Disks. Multi-Channel SACD/DVD-Audio Downmixed to 2-Channels by the Pioneer DV-58AV, takes Digital to a whole new level. Sounds three times as better than any 2-Channel SACD, Hybrid, DVD-Audio Disk. This player was on sale for only $275.00. Hi-resolution Multi-Channel Downmixes sets a whole new Standard, and it doesn't cost thousands. You can even go extra Amps and Speakers if you want, I still prefer the 2-Channel Downmix, but you would still have that option.