I have the C2600 that I got as a demo barely used unit and a fabulous price. I have been tempted to upgrade to the C2700 so I know your pain. I do not stream so the DA2 is not something I would use. But I am still tempted. I would say go with your feelings. Sometimes the urge to upgrade will not go away regardless of the need.
McIntosh C52 to C53 Upgrade
I had a McIntosh C50 pre-amp/DAC that I replaced with a C52. Now thinking about upgrading to a C53. For those of you that have gone down this path, is this a worthwhile/noticeable upgrade? Any noticeable change in SQ? I can't say in all honesty it was noticeable to me going from a C50 to the C52.