A DAC to beat NAD C541i?

The cable is 1m. Any reason why it has to be 1.5m? I've been looking for a new digital cable and will try one with 1.5m.
C541i alone sounds a little bigger than C541i+Paradisea. Yes, I felt a tad bit more dynamics with C541i. But the bigger difference is the warmth -- with paradisea it sound a bit warmer. Same feeling I had when I compared C541i with Rega Apollo which sound a bit warmer than C541i.
C541i alone sound more bright, and at full orchestration it sound a tad bit more muddy than with paradisea.

Anyway I like DR700 better than C541i or C541i+Paradisea. I wanted to use DR700 exclusively as a CD recorder, but if the paradisea does not open up with cable change or tube change, I may stick to DR700 and forget about DAC for a while. I guess my tube preamp (Rogue Magnum 99) is doing an excellent job in pulling all strengths from SS CD player, so I may not feel much difference unless I go for much higher upgrade.

Many thanks for wonderful tips.

Any SS DAC would better impedance match with bigger sound, better bass and treble extension? Then probably I would give another shot. Any suggestion?
I would expect the similar amount of improvement from Grado gold to AT150mlx. LOL

I think most reviews on Paradisea+ are correct: provide warmer sound but lose some detail, except that I did not experience wider sound stage with Paradisea+. DR700 even provides better dynamics.

DR700+Paradisea is more pleasant to listen than C541i+Paradisea, but still DR700 alone is better for me. Paradisea may be different on ss preamp.

OK, enough for now. I will get back when I have a new digital cable (1.5m).

The extra half meter delays internal reflections just enough that they don't arrive at the DAC in time to cause jitter. Here's a quote from another thread to explain why.

[Almarg]If the input impedance of the dac and the impedance of the cable don't match precisely, a portion of the incident signal would be reflected back to the transport. A portion of that reflection would then re-reflect from the transport to the dac. The two-way reflection path, assuming propagation time of roughly 2 nanoseconds per foot, would be 12ns for the 1m cable, and 18ns for the 1.5m cable.

I don't know what the typical risetimes/edge rates are for transport outputs, but it does seem very conceivable that the extra 6ns could move the arrival time of the re-reflection sufficiently away from the middle area of the edge of the original incident waveform so that it would not be responded to by the digital receiver at the dac input.