... you don’t get home audition from dealers all over the world. So that option is out of the question ...
It’s certainly true that some dealers do not offer home auditions. I’ve found that the "better" dealers - the ones who sell gear other than just mid-fi or mass market electronics - usually do provide the option.
Many online dealers advertise 30-day (or longer) trials. Brick-and-mortar dealers who offer this option don’t necessarily advertise it and it’s likely they won’t offer it to some nameless voice on the end of a phone. If you’re in the shop, it’s likely they’ll qualify you before offering the option. It’s that way with many high end sales. Home auditions are common, so simply stating "that option is out of the question" is plain silly.
My system which retails north of USD 30K, I have bought it blind without any audition.
I can’t imagine buying components that way but I hope it worked out for you.