Mc Anna , Lyra Titan or DynaVector XV 1s

Roll the dice

A lot of cartridges sound very similar to each other, of course not
identical, but at the end of day it is the way it is. The Titan i is good but it
doesn not make so much sense when you own A-90 already and you
want something different. The XV-1s is different, but imo nothing
special, slow, anemic and simply much too expensive for that kind of
"Standard". DeKaitora Rua is much better in everything... The
Anna is brand new, of course it gets the ultra Hype based on that but
here is the same story, A-90... Anna?
When you want something really different, musical, something which
gives you the impression of the real thing sound, think about a Zyx
Universe. It is also a perfect match to your Arm.

... the tonearm cable off the SME V is arguably the most important cable.

May I suggest to do a rewire first inside the SME Arm before spending a lot of money for the tonearm cable? It is well known that the SME inner cabling is nothing special and a rewire will give the most bang for the buck...

Some time ago I read something about rewiring SME Arms and that the
Factory offers that Service (their wire or what you supply) .... maybe you
can ask a Dealer about it.