Some days I think it's worth updating to v4 just to get the magnetic grills. I smile every time I remove or replace them.

BTW I think at least one of my Axiom pairs has the clear binding posts but I haven't found them yet.

So far the oldest ones have solid brass with a thin red/black ring, which looks sharp but I remember being a pain to hook up because I was usually looking end-on when plugging cables in and that was the one angle that did *not* allow you to see red/black. Ended up resorting to "red right returning" or some such thing.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8