I have a Dell and a build your own type of computer in my home office. My Dell burnt up a hard drive a couple of years ago, but it was still under warranty and they sent out a tech within a couple of days to repair it.  
My Build your own type of computer has had various components replaced including the mother board a video card and a hard drive 

  fortunately I have a friend that can repair them for a decent price.
I personally would buy another Dell  (JMO) 
