Looking for a new computer

I'm looking (for a friend) for a new computer. This is your typical home user who is replacing an XP machine. This Dell seems good to me. One thing I noticed is that it doesn't use an ATX power supply. It's using one of those slimline PSUs which I don't keep in stock. Anyone know if the ones Dell uses are proprietary? Also any other comments are appreciated.

Dell Inspiron 3668 offers extensive storage and exceptional power in an innovative design that saves you space, without...

Looking for a new computer