Interesting. All three models were introduced in 2010. All three were recommended. The Seasonic and the OCZ were recommended for mainstream use. The Antec was recommended for gaming. The recommendations were based on competent technical reviews published by sites that have the appropriate equipment and personnel to perform rigorous in depth testing and component analysis.
Here is a link to a psu recommendation list I maintain:http://www.johnnylucky.org/power-supplies/psu-recommendations.html
Scroll down to the 3 brands where you will find links to the reviews that you can read.