The (mythical) puported superiority of "customs" is old as this forum and its predecessors. As are crap customs, which you allude to.
See also: the hype knife of the moment merry go round.
Mid-weight, excellent distal taper, thin behind the edge, great steel = Yoshikane SKD or Gengetsu SS.
And you'll have c. $500 left to blow on blackjack and h**kers.
There were Zensho in SKD and SLD clad stainless too. I have the 240 Zensho SKD migaki. The endgame of gyutos for me, think I bought it in 2011. I also had a Tamomoku in V2 for a time. Shouldn't have let that go really.
Aogami hype-r sounds like the mystery steel that Kato uses. Apparently the edge retention of this steel increases tenfold if kanji that looks like it has done by a five year old is chiselled onto the cladding.
Bernal Cutlery have a good selection.
The more interesting Yoshis are scarce now. The SKD hammered is still a great knife, and has been pretty much since the beginning of these forums.