I have the DDP-1 and PS and love it (I have had it for about 4 years). I think I would have to spend quite a lot more money to get a preamp/DAC that sounds a lot better (the DAC module is the part that may be showing its age).
The T+A 200 DAC/pre is basically a newer, maybe better version of the DDP-1. Reviews have been good.
https://jaguaraudio.com/product/dac-200-dac-by-ta-hifi/?gad=1&gclid=CjwKCAjwsvujBhAXEiwA_UXnAJZuiupE1EDWymx0DFrCKuWzbzS2zYZPkfa5ooBTzyVWNBxOEFYB0RoCMqIQAvD_BwE
I am thinking of getting an integrated amp (Aesthetic Mimas, Ayre or other) and a separate DAC, because DACs seem to be the fastest evolving component. Good budget DACs can be had for a decent price.