Filtering out all the super cheapo PSUs I have come down to:
Enermax Tomahawk2 500W
Silverstone Strider ST40F-ES 400W
Which is better? Both PSU designs are over 2 years old, but seem to be the only reasonable brands in this list for a low power PC (this one).
It would be nice to get the Corsair CX430, but all are out of stock.