On a plus, both your and
@ckhirnigs113 findings of the Metal base GZ34 pretty much match mine of the Fat Base version F31 smooth plate, no notches. They can be had for a bit less than the metal base… although catching up.
I’ve been listening to electronic and EDM genres with the Fat Base plus EL38 and the bass, weight sounds spot on. Very fast dynamic sound good treble extension but smoother, less grain than the F32. The bass has weight and hits hard, fast. Layering is very good with distinct separation between instruments. As has been mentioned a liquid solid state sound/ish. Detail without harshness.
Edit. Just to add that the Fat Base GZ34, and I’d imagine the metal version to, has this uncanny knack of making distant sounds sound like they are quite a bit off in the distance. The layering of distant, mid and very close sounds is very good very distinct which gives a very nice 3d feel.