Hi Wig, that's interesting. I'm not surprised you found such a wide difference with the Berkeley dac. Re: the CD-5s, there is a wide performance gap between the CD-2 & 5s. The CD-5s is built around a full Skylla 2 dac and features higher grade caps, an extra power supply with full "bridge" tube rectification and is a higher end proposition overall. Besides, there are ways to improve the player significantly without dropping another $5k on a dac ;) Consider that the CD-5/5s uses 4 x NOS OPA627AP op amps. These were the best op amps 20 years ago, but are only midrange op amps today...and the signal is passing through those things. Also, better output tubes can be sourced. I'll leave the rest to your imagination.