To Schubert, Thank you for the comment. I floated a similar thread out about three years ago when the DAC issue was hot. Many members said... save your money and buy a new CDP, because an under $1000 DAC would only make a marginal improvement, if any with the Rega, even the Rega DAC
Nevertheless, I have considered the above CDP's; some claim the 840C is the smoothness, others give the Sony the highest marks.
If you have any suggestions for DAC's under $1000, please let me know. The Micromega DAC at $400 is supposedly a killer, or even the original Peachtree "My DAC" which supposedly has had lots of reliability problems