I have experience in both. I had a 4tb Synology NAS tied to a Lumin D-2, then A-1 and then X-1. From a system perspective, I had my files and tidal and Qobuz so I was happy with the sound and performance. It was a real nice system.
Then my whole two-channel system was sold with my house so I started over. I started with a Lampizator Pacific, a Lumin U-1 mini and my Synology NAS. I was a tiny bit disappointed so I began researching Music servers. I came across a UK / Poland company called Lucas Audio LDMS. I had many conversations with Lucas via What's App and I realized he was a computer genius. I ordered one of his music servers and it took a long time to get. However, once I installed it in my system, the results were fantastic. He loaded all of my music onto his server remotely. His level of customer service is outstanding and I live in Arizona. You can get one of his servers at many levels of features and price points.
So in summary both ways work, but the level of detail you get from the music server was the home run for me. Good Luck.
P.S. FYI, I recently sold my Preamp and am very happy running the DAC directly to the Monoblock amps.