@fredorama I've owned the Diablo 300 for a year but unfortunately it didn't work out for my speakers, it was way too bright in the trebel and bass was not impressive at all.
I sold it a couple of month ago and purchased a Vitus SIA-025 Mk2 which is class A, it is much more refined and delivers much more current than the Diablo 300.
The Vitus is very smooth and liquid sounding.
I'm sure the Diablo 300 would pair well with Wilson Audio speakers.
@rick2000 The Audionet Humboldt is definitely my favorite integrated, i've demoed it in my system it is spectacular!
You also have the Vitus SIA-030 and the Pilium Leonidas in this categogy