I have a Micro ATX Hp case (Ugh, I know).
It currently has a 300 watt Hipro (Model #: HP-D3057FER). You can obviously see why I'd like to upgrade. It states it has 19 amps on the 12volt rail, but I don't know how they tested it and under what conditions; might be right before the PSU explodes.
Also, the length measurement was the hardest to do. I couldn't physically see where the PSU started and stopped, so I was left guestimating. The other measurements seem pretty on par with ATX dimensions.