I plan on purchasing either the SCD-C555ES or the SCD-XA777ES SACD player to use with my Norh 7.0s and LeAmps. Right now I only have the two speakers/amps for two channels and possibly plan to add 5.1 in the future. My question is do any of you have experience with the Sony TA-P9000ES multichannel preamp? Does it add any signal degradation if used as a preamp (not just a switchbox)? Thanks for any suggestions/comments.