Some of my own thoughts regarding the LZ A4 and LZ A5:
I still have the LZ A4 and was just comparing it with the Fearless S8 Freedom with Symbio W tips on both and was surprised by how well the A4 held up. In some ways the A4 reminds me of the Sony EX1000 in terms of of its openness and organic tonality, albeit with a much more visceral bass response with the red back filters on the A4. While I would put the S8F in a class above the A4 in terms of clarity, refinement, and soundstage, the A4 is still very good in itself and subjectively makes for a more engaging listen to me.
I also had the LZ A5 (since sold) which I thought was excellent in terms of clarity, detail retrieval, and soundstage. I didn't get to compare these to the S8F, but I did compare them extensively against the Campfire Andromeda, and thought they were on par technically. I preferred the fit and isolation on the A5 to the A4 as well. Unfortunately, I found the A5 too heavily V-shaped, even with the A6 filters.