Mozzie00 :
WOW BRO... wasn't looking for pity, was just looking fo advice. As far as it being that easy, i have seen plenty of stories of problem after problem. But thanks for the love Trump...
Then why self deprecate in a public forum if not to receive some kind of... empathetic reaction?
What advice are you looking for?
You asked the difference between computer builder's quality - there is no difference.
A 6700K in a Z170 with 16GB of RAM and a 600W PSU with a GTX 1080 will perform identically, regardless of who builds it. Dell, HP, Me, You, Maingear, it doesn't matter - the quality and robustness comes from the components.
The advice is - find a build you want. Do you want an i7 6700k? with a GTX 1080? Then write that down, and get quotes from the various builders, and go with whoever is cheaper.
You have not asked for any advice, nor said anything. You have written novels of text and downvoted those trying to help. And those walls of text contain... no content at all. And you say i'm trump like? Lol. That "list of parts" that those companies don't have (They don't have Intel i7 CPUs or ASUS mobos? seems hard to believe) is called a signature - its my personal build that i use, not something i'm suggesting you use.