The 2900 is internal, the 5900 is exrenal, and I am driving myself NUTZ, I have the Exemplar(non siltech) at my home, I left my APL SACD 1000 in trade for a week, and I am also talking with Dan about doing mods on my stock 2900(which sucks)...this audiophile stuff drives me crazy.....Glad to hear you like your 5900, cause if I have Dan mod a unit for me, I just learned, from you that it plays HDCD also, and I would like all formats.
Best
steve
Best
steve