I could use some input. I'm building a spare/replacement computer and I wanna make sure I haven't missed anything or that everything will plug into whatever it needs to. Planning to reuse the mouse, keyboard and spinning rust drives. I'm hoping to have a upper-midrange gaming computer that would last me about five years or so {the current one is about this old, but I'm fearing for its... structural integrity. It had more than one brush with death}.

Edit: With that in mind, can I get away with any lower-end components? How much of a performance drop would I get from a 570 GPU, for example?

computer.pdf

The total price is in Canadialand dollars, by the by, which is currently worth about 75% of the US one.