What are recommended PSUs for Antminer S3 to buy - in Europe/US?

I don't know much about PSUs, so a link to a PSU 101 article (at least as it relates to bitcoin mining) would be welcome as well.

I read:
http://www.reddit.com/r/BitcoinMining/comments/24intr/best_corsair_psu_for_my_antminer_s1/ch7mntp

"Efficiency ratings describe the amount of electricity that the PSU loses as heat while powering the unit. Because miners are always on and consume a lot of power, more efficient units generally recover their higher purchase cost in less than a year. In nearly 100% of cases you'll save money by buying a platinum (or gold) rated PSU."