because COD is not what it used to be and the developers do not listen to what the people actually want.
Farming simulator doesn`t need that much to run either, unlike COD
seems quite good, I`d go for an SSD over the HDD though, only if you don`t need that much space right away.
SSD speeds are really good and you`ll definetly see the difference
What noise are you worried about? I hear quite a lot trough my Grado SR80 (also open), but you`ll get used to it.
If you have decent fans in your comp, you won`t notice them, cars, trucks and such will be audible most of the time
Than switch the hdd for a cheap SSD, with a decent capacity if you won`t really need that much space.
Trust me, SSD is worth it, even if you`ll need to give up some money for a lower amount of storage
The possiblity of fucking up is always present, but building on carpet isn`t smart, fucking wiring up is bad too, but putting in directly onto the case is just really stupid...
The only thing you need to do, to not fuck up is: read the manual
http://pcpartpicker.com/list/x3YsLD
or
http://pcpartpicker.com/list/MTyhkT
with the 1070, you`ll gain GPU performance, but will be a bit less in every other aspect