Suit

Advice on suit please

I need to get a suit for professional environment. Considering buying a black two piece suit/blazer. I honestly don’t see the difference between brands and clothes. Not going for tailored ones as I don’t trust the tailors here.

I don’t want to get something very cheap, or go overboard. Which brand should I go with?

And where should I get it from. Ideally looking for something in between 5-10k.

I saw a Raymond blazer for ~6k and a louis philippe two piece for 13, honestly looked and felt the same to me.

please guide, thanks