Mike, I love very much the sound of the ECC32 and have very similar impression like you do. It's about 100hrs mark of run-in. They really sound good in my WA5LE with HD800 and LCD-2, I sometimes connect the LCD-2 in high impedence output and it sound as good as in low output. And there is no heat issue with the ECC32.
Dannie, I'm starting to notice a heat issue. Yesterday was the first full day I played these and the WA22 power supply was the warmest it has ever been. I could place my hand on it and it was not too hot that I could not leave it there.
Also, I have to set the impedence output to low as this tube really puts out the power. I have only tried them with my HD800's and have not gotten around to hearing them with my LCD2's. Today I put my TSRP's back in and noticed that the sound was a little "easier" to listen too, not so loud. However I am breaking in a GZ37, so there is that.
Later today I'm going to pair the ECC32's with the EML as I think the GZ37 is also a very powerful tube. I imagine the WA5 loves those more powerful tubes. It seems sometimes that the WA22 needs lesser powerful tubes and I am not sure why, but this is an impression I am getting lately that the more laid back tubes seem to work better in the WA22. However I am using an HD800 for most of my listening and I think if I were using the LCD2 more, those more powerful tubes might be better. But this is just an impression that I am forming and am not convinced yet.