I have had couple of long conversations with Stan Warren (SuperMods) and, I must admit, most of it went right over my head [:)]. He does a lot of mods to DVD players and SACD players, and thinks the Pioneer DVD players are well laid out and a very good bargain as a transport. (And with his mods on the dac section, a good player in total!) If you did not care about 24/96, he reports the $100 AIWA 5 disc changer is a remarkable transport. Really!
I also use, and enjoy, a DAC1/Pioneer DV525 combo connected via Toslink (XLO.) Mr. Warren recommends the $60 2 meter Fatwire toslink, and I am going to give it a try. He reports, just like the boys at Bel Canto Design, that there is jitter reduction with this set up.
Good Luck,
Charlie