We have 28 DC7800's here. Not a single fault in a year, will be getting mor of that kind of thing soon, we also had major problems with the Dell GX270's and their video cards/motherboards... The HP business desktop DC7800's have been superseeded by the DC7900's now which are actually less than you can find the dc7800's for now. The 3 year warranties are cheap (if not inclusive!) too..
[sorry for resurecting an old post, my bad!]