Hi Thi,
Nice set up. I also use maple wood platform in all my components even under my monitor stands but I have used the Mpingo and Shunmook isolation feet(if you can afford them)between a platform and components. You will listen more transparency even more 3D sound.
By the way do you like the sound of Siemens CCa 6922s for your CJ 17LS or have you tried them before?
For your information, I have just tried Audience Au24 speaker cables and interconnects in my system. Men! my music is so holographic and seductive. Give a try and you will be amazed. Good luck, Thi!