My experience. Putting SR Reds in my Bryston BDA-1 and Musical Design Elite Ultra tubed pre resulted in a noticeable but very small improvement in SQ. Not the "aha" result i was hoping for. It was something akin to a cable or IC upgrade. While I am now tempted to replace the Reds with Blacks, 30 days have passed; so no refund and, after spending good money on the Reds, I can't just relegate them to my parts drawer. In the meantime, new spkr cables (that I'm familiar with) should be in my hands this week. So, anxious to get them in my system.
gbmcleod-fwiw, I had your CD player for approx. 10 years and loved it. However, replaced it a couple years ago with a Bryston BDP-1/BDA-1 combo and was overwhelmed by the clarity/detail that I had been missing with the FMJ-23. In addition, the Bryston combo enabled me to rip my cd colllection (and a large number from my local library) and put the music on thumb drives thereby allowing me to access any album or song from my love seat using my iPad remote. The days of getting up and swapping out CDs in a player's drawer are a thing of the past. I know there's better players and DACs available. I think you would really enjoy a digital upgrade.