Frankly, i believe the sums rm150k or watever figure is relatively different to different family. If ur annual earning is few times above 150k, i don't think the wife will goes crazy mode. Conversely, if the family annual is much less than 150k, then i believe u probably didn't prioritize ur purchases very well. Unless all ur watches collection is for investment purposes. Which probably u won't be enjoying wearing it anyw coz u want to keep it in pristine state.
So, it is relative to the family incomes. The higher u go, the less chance of the missus to gets angry. Coz she'll be pampered enuf or rich enuf not to be bothered by our toys.