Does anyone out there NOT hear a difference in CD

I'm guessing the Cambridge would only be marginally better than my old PD-65. Probably not worth spending the $1600 on it.

Maybe the Benchmark DAC I've been seeing some write-ups on would be a better decision.

There is a clear difference in how CD players sound! I've just been going down the road of replacing my Shanling CD3000. I've listened to...Cyrus CD8x, Niam CD5i, CEC 15XT?, Musiacal Fidelity A5, Tri CD4SE, Marantz SA11. All were very different and some were horrible in my system and some were mind blowing. All were in the NZ$2500 range. The best in my system was the Tri CD4SE. It had the most X factor for musiacl enjoyment and the best for long listens without fatigue. When you consider the design of all these players ie tube buffer output stages vs Solid State vs crystal vs chip vs no upsample vs upsampling, they must sound different, the same as a BMW drives different from a Toyota Corolla.

I hear slight differences, however, compared to the distortion and different presentation from speakers these differences are extremely small. I find speakers vary from absolutely terrible to almost "you are there". I find nowhere near this kind of large difference in CD players so I just don't lose much sleep over it. A small bit of coloration here or there but nothing earth shaking.