Hello,
You have serious money to spend on a DAC. To me DACs have a sound signature. You would have to demo them. All of the DACs listed here are really great. If you have the inputs on your preamp available. Maybe get two or keep you chip based DAC and get an R2R. They have a realistic detail to them but can sound warm on some systems. This is probably why they are adding a chipset that can be switched on and off. 11stereo.com or OCDHifiguy on YouTube has done some of the best a/b comparisons out there. The issue is that you are a little below the all time greats and well above the best value for money. One thing that makes a big difference to me is an isolated power supply. Achievable with an SBooster or the manufacturer was smart enough to isolate it. Go with $5000 DAC for now and upgrade later to a $14,000 or more DAC later. https://www.11stereo.com/
You have serious money to spend on a DAC. To me DACs have a sound signature. You would have to demo them. All of the DACs listed here are really great. If you have the inputs on your preamp available. Maybe get two or keep you chip based DAC and get an R2R. They have a realistic detail to them but can sound warm on some systems. This is probably why they are adding a chipset that can be switched on and off. 11stereo.com or OCDHifiguy on YouTube has done some of the best a/b comparisons out there. The issue is that you are a little below the all time greats and well above the best value for money. One thing that makes a big difference to me is an isolated power supply. Achievable with an SBooster or the manufacturer was smart enough to isolate it. Go with $5000 DAC for now and upgrade later to a $14,000 or more DAC later. https://www.11stereo.com/