To Couple or Decouple?

I've recently purchased a pair of Acoustic Zen Crescendos. I now have them positioned in the room, and I am ready to add the spikes. The floor in my room is a suspended wood type. After researching whether or not to spike speakers or decouple them on a suspended wood floor, the majority seems to recommend not spiking them directly to the wood floor, but decoupling them. So here are my questions:
1). Do I couple or decouple?
2). Anyone use the Boston Audio Tuneblocks S under your spikes? How do you like them?
3). Any recommendations of other decoupling devices to use?
Thanks for you input!