It really varies. About $1200 would handle everything I'm likely to want, like a full 16GB of RAM, a solid case ($80-$100), a 512GB SSD, and at least a GTX1060-class video card. If I had only $700 though, I would not be suffering, and for some uses, I might manage with <$600. That assumes I'd be starting from scratch though, which is not the case. As a long-time system builder, I have the "unfair" advantage of a pretty deep spares bench from which to draw. The unfairness doesn't stop there, as a mainstream motherboard reviewer, as long as I don't want a "Z" board, chances are an available review sample will knock another $80-$100 off my build price.