I am trying to decide whether to get the Pioneer DV-47A (SACD and DVD-A) or the Sony SCD-555ES (SACD only). I'm wondering if there is much advantage to being able to play both formats. I have not looked too carefully at the current releases on DVD-A and SACD but am I effectively doubling the number of titles I can play if I get the Pioneer? Or are there many releases that are in both DVD-A and SACD formats? From what I've seen, most of the releases seem different. I'd appreciate any advice on the matter.