I presently use, I would think any 5k dac will be a big improvement on my current gear.
Mike @wrxsti : I agree with this. You will just to figure out which DAC. You are most certainly in the right path with the N-05xd, but of course, there are many great DACs out there, that have a streamer (network bridge) built in.
I have the N-01XD for the past 2+ years now, and it’s definitely my endgame DAC, until it breaks down I have zero interest in looking at other DACs. The N-05XD was released later / more recently, it’s below the 01xd line, but I bet it’s a great DAC, same sound signature as the N-01XD

