let me ask something why these guys use i7 or i9 CPU
?is it bad for PC

yup you right. i am planing for future. he only had 10000
so in my point of view i would plan to install a GPU in future.
not now. that is why it needs a psu like this (even though 650 W is my best choice)
Are you smoking something? this one can be OC to 5 GHz. i think you better find out what is OC means..... but to overclock it needs advanced options on your MB. so that is why you need a good mB to build this kinda PC
tell me how i am wrong