I just recently picked up the Yamaha A-S2000 and matching CD-S2000 in brushed aluminum, to say the pair is gorgeous is an understatement! The heft and build quality of both units is really outstanding. I know they have been mentioned in the past on this forum but I don't think anyone on the entire internet has paired them with Rega RS5 speakers (I know because I exhaustively searched before purchasing!) I was concerned the amp wouldn't be able to drive the Rega's into their "sweet spot" like the diminutive Rega Brio-R I had prior was able to. Some professional and personal reviews alike accused the Yamaha of being "too smooth", "laid back" and "lacking excitement" so this had me a little concerned because the Rega's are such enthralling and communicative speakers but I decided to pull the trigger anyway paying more attention to the resoundingly positive reviews I had also found on the web. On to sound quality...holy expletive! Everything just disappears and the music just flows so organically and without a hint of digital harshness. I hate to use the words "analog" and "tube like" but it really is the best way to define it. Infinitely smooth but not laid back at all, crisp but never sharp or fatiguing. Authoritative and weighty sound complimented by clean well articulated bass. I am hearing significant new details in CDs that I have heard 100 times before. The sound stage is wide and the channel separation really stands out. This combo really could entertain you for hours without listener fatigue and I actually prefer it to Rega's own Brio-R and DAC combo. The Rega combo is very entertaining as well but didn't seem as detailed to me, slightly grainier and a somewhat darker sound the Yamaha combo. This really may be one of the best bargains in HiFi in my opinion and I think they are my ticket off the merry go round, at least for my 2 channel system (my home theater is another matter) I was able to pick them up brand new for well below MSRP so if anyone might be on the fence I hope this review is helpful.