Looking to get the best out of Redbook Cd listening with Dac a d Transport under 5K?

I recommend the Cambridge Audio CXC cd transport.  This transport does one thing only.  It reads CDs, nothing else and it does a fantastic job.  I think you can still find version 1 on Amazon. for $399.  The new version is little bit more expensive.  I tried this unit with a Rega Dac, a Micromega MyDac, an old Cambridge Audio Dac and a Musical Fidelity V90 Dac,  I was never disappointed on how well this unit read all my CD's

Best of luck.