I can endorse he preamp in the DAVE DAC.
Many people need more inputs that most DACs have, especially a phono. If you are all digital, a DAC will work.
Finally, some think a preamp adds to sound quality. I take a different approach, the sound quality is all in the recording and everything that touches it can only take away. Find the components that degrade the sound the least. If you don't have a preamp, it cannot degrade the sound.
Jerry