I definitely read that review, but forgot about the Merrill amp reference. Thanks. I reread it, and think that might have been what planted the seed in my head that Class D could be a good match with Sound Labs.
I tried the W4S again after more break in and it still sounds good, just not as juicy and enveloping as the AtmaSpheres.
I’m hearing good things about Benchmark with Sound Labs, so may give them a shot down the road just out of curiosity.