While I would buy every single speaker on earth put on a Mesa OS 4x12 xDDD...
Your track record is impeccable so if you say that after testing XXX speaker it sounds "best" (as subjective as that adjective could be) in a Marshall, Zilla or your own York audio cabs I will 100% trust you.
Also, the combination of a proprietary cab design + cool speakers (weird, vintage, pre-rola, etc) sets you apart from the competition.
Without naming names, there's one competitor that has many cabs based on the same physical cabinet with different speakers because he thinks
it's the best sounding one he has (and I bet my beard they are by far his best-selling ones...)
I mean, not trying to be an ass-kisser, but every single one of your packs sounds amazing, and you possibly have the most amazing sounding but still "simple/one track/no processing" demo clips out there.
And you could possibly be the most active IR developer on forums, and you REALLY listen to your customers
(you bought the friedman mic clip and the hesu demon speakers just because I mentioned they would be cool, and I'm still so impressed about it that yours are the first IR packs I recommend to anyone)
My brain tells me that I want a V30 in an "old" Mesa OS cab and a greenback in a 60s/70s marshall but the only thing that matters
is how the final product sounds.
I mean, if you put out a v30 pack in your york audio cabs, I would still buy it even if I already have your mesa pack xD
People would be shocked at how one of the most famous impulses ever out there (S-pres-high) was recorded (equipment and recording conditions) and that impulse is on hundreds if not thousands of metal records for many years and used by top tier rock/metal mixers in the industry.
Celestion plus uses "nameless" cabs, but their packs sound meh at best...
Eminence for some godforsaken reason shoot all their packs in a 3rd Power 112 cab switchback cabinet with a partially open back...and its sad how laughably bad their demo sound clips sound.
as a last resort you could always take a test shot and make the public (or better still...beta testers whose ears your trust) decide in a blind shootout....
TL;DR...Trust your gut (or ears in this case)