Sonarworks sounds interesting, especially with the free trial. Worth a look.
To be clear, I certainly did not complain of "muddy" bass.
muddy Ill-defined, congested.
I said that bass with the Balanced pads was plummy:
plummy (British) Fat, rich, lush-sounding.
I do not hear sibilance with the A pads, only with the B pads.
Sorry, didn't mean to project my thoughts onto you. Looking back, muddy was probably a poor choice of words. I had thought the balanced pad's mid-bass was 'muddy' in the sense that it dominates the sound and make other frequencies less distinct, completely changing the tone of some songs. I suspect that's why you prefer analytical pads, because that mid-bass region is pretty much flat on the analytical pads.
I personally think the 'sibilance' on the b pads is just too much treble quantity, which can be fixed with EQ. Compared to balanced pads, I'd say the analytical pads are relatively more veiled. But because this is due to the design of the earpads itself, this can't be fixed with EQ.