That's what I meant by bum link- that links the J523, not the V523, a true Matx case. I've seen 'em with 300w psu's, just not at the moment. V523's definitely will accept standard size atx supplies, I've done it. Some of the other v5XX models are also available with 300w, but they don't breathe as well. Newegg carries the V523's, they're out at the moment, but the pics work.... The LiteOn is also a good box, add a super quiet Seasonic or Fortron/Source(Sparkle) 300w psu-
Directron also carries a Matx FongKai w/ 300w, but it's deeper front to back and the supplied psu is noisy...