Ricky - As you advised, I bought an Audiophile 2496 sound card from
http://www.midi-store.com for $159, and installed it last night. Although I expected a small improvement as compared to the sound that I was obtaining from the integrated sound outputs of my computer's motherboard, the sound produced by the Audiophile 2496 is absolutely amazing. I have been using a Maranz CD5000 CDP as my source, and never imagined that the sound from the Audiophile 2496 could possibly come close. Well, the sound from this amazing sound card is way, way better than that from this Marantz CDP. The sound field is much broader, the sound clarity and separation are much better, and the focus and placement of each instrument and singer in the sound field are absolutely sharp. As a consequence, I've removed the Marantz, and the Sony DP-IF5100 Surround Processor from the system, and I now feed the signal from the Audiophile 2496 directly into ASL-1005DT amp., through the Creek OBH-10 passive preamp. Thanks again for your wonderful advice.
dparrish - I no longer consider buying a SACD/CD/DVD player, and am now only considering the purchase of an SACD/CD player; i.e., one with audio, but no DVD capability. The player that I'm considering most seriously is the Marantz SA8260. But now that I am getting such wonderful sound output from the Audiophile 2496 card, I wonder whether there will be any further noticeable improvement when playing regular (i.e., Redbook) CDs through the Marantz SA8260 SACD player. Of course, it would be nice to get this Marantz player for evaluation (i.e, with a 30 day money back guaranttee), but I haven't even found a place where I can buy it. Do you think that a noticeable improvement when playing regular CDs will result from using the SACD player in place of the Audiophile 2496 card? Also, can you suggest a place where the Marantz SA8260 can be bought?