low end boxes from anywhere are going to be more troublesome.
Even if building my own box, buying the low end components means I may have issues down the road. That is a main reason that I usually end up spending $$$$ to get a good system up and running.
But yes, I got a shipment of DC7700sff systems, and these have been full of problems. low cost -- and barely worth it.
And the funny thing, you hit it on the nose, power issues seem to be the plague on these. However, disabling power management in the BIOS has resolved most of the issues.
I actually had one of these all setup and working fine, I placed it at the users desk and could not get the DVD burner to read a cd. replaced the cd drive and it killed the keyboard and mouse. replaced those and it has worked fine since????
I still do not trust this model though.
For the most part I have been happy with the HP equipment that we have. And for home models I have a Pavilion desktop which works fine (when I use it anymore).