If I was to purchase a pair of jeans, I would purchase a pair of Japanese denim.
https://www.highsnobiety.com/2012/11...ds-best-denim/
Article is a bit old but quality is quality.
YSL is supposed to have high quality jeans as well. I just don't really care to wear jeans all that much anymore. I'd rather pay $15 for some slim fit pants on clearance at Old Navy and use the extra $300 to buy something cool like an Ed Hardy or Affliction shirt.