A lot depends on why you are buying the house. Are you buying it mostly as a home or mostly as an investment? There is a difference.
For the most part, upgrades are high-profit items for builders. They aren’t designed to enhance the value of the house, but make you happier with the house you do buy.
If you are looking at your home as an investment, this is a very different matter and will depend on where you buy, what is happening in the property market, and what market you intent to sell to after your upgrades.