I built a small system using that lian li case. It is tiny and...cute. I used an Antec 430w modular psu I had lying around. Even that fills up the box. It is not so much the standard ATX psu size, as where to put the extra cables. I still needed two sata cables, one for the dvd, and the other for the hard drive.
As a piece of advice, be careful when you remove the screws from the side of the case. They are very small, and easy to lose. They must be put on at the factory buy women with Popeye arms. Lay the case on the side, and press in, very hard with your phillips head screwdriver to loosen them without stripping them. When you reinstall them, you can just leave them snug to be able to remove them later.
The front panel usb header cables may be very short, and a tight fit across the motherboard. I thought I was going to have to get an extension.
All in all, though a very nice and satisfying box.