Dbpoweramp ripping DSP effects / Replay Gain settings for perfect music library

I am building my digital library (more than 1000 music CDs) to manage by Roon to cast KEF LS50 mark II powered speakers. I am very sensitive to loudness ( most of my library consists of music CDs from 1980s, 1990s without loudness issues) So, I would consider my self a purist regarding my musical taste. I am using Dbpoweramp to rip my CDs into FLAC format. What DSP effects / Replay Gain settings do you recommend. ? Thanks for your support.