Best wood for an isolation platform

Mattcone, I use the Walker Audio amp stands made from 3" rock maple butcher block and I've been very pleased with the result. They are mounted on Walker Audio Valid Points screwed into the maple butcher block.

You can come close to replicating these on your own if you find a source for rock maple, such as Boos (cutting boards) or various manufacturers/providers of butcher block kitchen counter tops (e.g., Timbernation.com or McMaster-Carr).
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FIM is fine but CDP and phono is where I've used it.
Butcher blocks are my favorites ...... especialy Bamboo and Maple.
You can also try two layers of Baltic Birch Ply and MDF in between.
Add cones or isoblocks, depending on the component and desire effect.
Sand boxes also work in some applications ( turntables, speakers for exemple ).
Parts-Express is good store for inexpensive tweaks.
Marshall is best for discounted Butcher blocks.

Check Agon from time to time for good deals on cones, spikes and similar.

Is it the experience of those using butcher blocks that edge grain is superior to end grain?
My Mapleshade maple base shows edge grain, if I am interpreting the terminology correctly.
And, the gorgeous Walker Audio amp stands (reached using the link provided by Rushton) show edge grain construction.

I use 3-inch custom-made maple platforms under my Audio Space tube monoblocks. I ordered them unfinished from Arcadia Audio at what I think was a very reasonable price, then finished them myself.

I set my amps on EdenSound BearPaw heavy brass cones, again a very reasonably-priced product. The cones alone improved mids and definition, but add the maple blocks and triple the effect. The image is very much better defined, timbres truer across the spectrum.

Listener57, this is my second set of monoblocks and second set of maple platforms. I haven't tried the edge grain vs end grain comparison but don't you have to have an end grain somewhere? My blocks are made of three pieces glued edge-on so that there is end grain at front and back. I like the look and think the sonics superior. Could there be room for improvement?

I've made my platforms from hard rock northern maple. Maple seems to be a default go-to wood because it does sound good, it's easily available in the quantities a manufacturer needs, it's environmentally responsible, and it's reasonably cheap. Is it the "best?" I'd like to experiment myself with other woods to find out. In particular, I'd like to get some Sitka spruce and make a platform. I know Altmann audio claims spruce has remarkably good qualities for supporting their Attraction dac circuits.