1+ for the Umami!
If you are going to look for speaker platforms, take a look at this before. I wish I could post pictures.....I could show the decay difference between the Credo Audio and Townshend Podiums... Both are very good, but the Credo has an edge IF they have the platform that fits your speakers.
Here is a video that compare different setups. tedious but good. I did my own comparison using REW and I can confirm that at least on my room with my setup i can repro what he claims.
Either way as mentioned before isolate everything, worth 10 times the room treatment because you are addressing the sources and not the symptoms.
Take a look at the decay difference!