I wanted to buy new PC to play game like D3 n so on. Since i knw nth bout pc stuff, mostly ask fren. I told the shop guy i want gaming spec and can play D3. maybe can have a better than minimum requirement. THis the list he gave me:

gigabyte z77p-d3
xigmatek 600w
wd hdd 500gb
gigabyte hd6850
corsair vengeance rm4gb

and quoted me 2.5k (East Msia price)

any above of this are unnecessary and can be replace with a cheaper one?

Please advice me:(