My previous (and first) desktop was a Dell E520, hostname "Lyoko". 1 GB of RAM, 1.7 GHz CPU, and a 160 GB HDD. It's been long overdue for a decommissioning.
I use this machine for web development, programming, basic audio / video production, and StepMania. It runs beautifully and I have no complaints thus far.
Parts not shown in the part list (because I already owned them): CODE 104-Key MX Clear keyboard, Monoprice Over-The-Ear Pro headphones, Western Digital 2TB external HD, Transcend 128MB external SSD.
This thing is easily the loudest part of the build, but that 5-year warranty is worth it.
Takes longer to turn on than the computer itself, but once it's on it looks great.
There's a paperclip shape molded onto the base, which apparently indicates that the base is magnetic, but it's kind of an eyesore for me.