what? $250 is really overpriced for a case. it will get you a really good case (see: https://www.newegg.com/Product/ProductList.aspx?Submit=ENE&I...)
>~$220 for a good power supply
that's definitely overkill.
>~$120 for CLC water cooling for the CPU
>~$100 for case fans
that's like, at least 6 really expensive case fans + watercooling. does the mac pro even have that good of a cooling system?