Its but obvious, Branded PC's should be gone for. Why its just like asking why parents are better than neighbours. Well because they care more for you, and will be there for you at the time of disparity. Think it this way, like I mean people who have spent millions of dollars on product development and a whopping 6-8% of revenue in Advertisements are better supposed to understand customer care, they have better process and people to deal with and surely a better product and empathy.
Also they would not fly by the night and be there at the requisite time with features like the International travelers Warranty.