Hey guys could you help me out and suggest which computer should i buy?

hey guys i am about to buy a extreme gaming pc and i was wondering which one should i buy i cant make my mind up lol so this are the links to the computers .1 http://www.dell.com/us/p/alienware-area51/pd?refid=alienware-area-51&s=dhs&cs=19. and .2http://www.click.ie/computers/desktops/hpe-485.html. so could you guys tell me witch one of this is better and why cause i dont really know much about computers thank you and please no trolling