Thanks to a link at the Inq, I found these two psu tests at a new Canadian forum. Unlike SPCR, which doesn't test or publish on low end units, this includes a couple.

Budget (400 watt) PSU Roundup

Budget 500 watt PSU Roundup

Canadians might be interested in the inclusion of two Nmedia models, which I think is an NCIX house brand. Interesting notes are the poor efficiency of the Antec 450 watt Smartpower II from the Sonata II case, and the disapointing results from an Enermax. Fortron did well, but Silverstone did better.