it is a double edged sword. when you charge friends to build they feel they have free tech support for life.
Looks like you really know what you are talking about, seeing as my dell dimension has lasted 9 years without anything going wrong, and my HP laptop died 4 days after I got it. There is a reason why Dell is the leader right now.
But yeah like hefemeister said, the GPU and PSU could be better, but you can upgrade later on if you want too.