Ang advantage sa mag assemble ka, is maka barato ka and nindot nga specs imong mapalit. I really don't advice buying brand new Computer set from malls because you usually get the poorest specs with the big amount you spend. If you know how to assemble or u have friends who knows computer parts and how to assemble better go with it. I myself assembled my own rig and I am very satisfied with the performance since I am the one choosing each component of it. Goodluck