Once in awhile you get a bad one. It depends upon who you get them from. I got two barebones units (case with mounted motherboard) in a row from the same company last summer, built my spare parts on them, and both would not load the drivers off the disk. The salesperson jumped up and down over the phone when I told him I was returning them and told him I didn't want a hassle. Called the credit card company up and they took care of it for me -- without a hassle. Seems those pcs both had viruses on their installation/driver CDs. If I knew it then I would have made a pair of CD swaps.
You did the right thing by returning the goods. Personally, anything I get by mail I spend no more than a day with it then it goes back.
DELL is #1 right now in home PCs fully put together. You'll have fun with it.
My friend is building one with a clear lucite case
I've got a case on order to replace my server on wheels. It's called Tequila Sunrise.
Always with an even keel.