Well... I have v1 ZS5 and I removed grills (as almost always do) and I like my ZS5 more without grills or foam.
Result really depends on source gear too.
Quote: Initial impressions: Mids seem a lot cleaner - clearer vocals, cymbals slightly recessed, more natural sounding strings - less "ethereal" / "holographic" sounding to me, so if you really love that effect, that might be a con. Personally, I'm extremely happy with the results so far.
On both my modded setups it doesn`t have any
added "ethereal" / "holographic" effect (only as much there is on recording, very few times been even less than should be) and mids sound very clear (to me it`s weird that vocals get clearer with added foam, they don`t to me - foam
around BA should actually recess mids coming from DD).
Sounds to me that some of You doesn`t have so "mids-capable" source gear or just aren`t used with high details SQ.
Anyway, I would anytime prefer SQ of 10/10 on HD tracks (great mastering recordings) instead 9/10 and making bad or not so good masterings better with losing SQ on HD tracks.
JMHSO