My experience with original Paradisea when I owned one is it was a very musical DAC in general and was also very responsive to tube rolling. Stock GE tube was warm and lush but somewhat rolled off, not great for all kinds of listening. NOS Tung Sol tube was much better but the SS mhdt Constantine I had concurrently and still run in my main system was much better for me.
I would expect newer mhdt tube DACs to be as good or better and perhaps have better USB interface implementations which could be beneficial. But have not heard or compared so can't say. Worth a try perhaps if you think you can do better.