I am seeking expert opinion on the best WP security plugin

Hi

I am seeking expert opinion on the best WP security plugin around. I saw that WPMUDEV has recommended iThemes Security via blog articles but a lot of folks tend to recommend Wordfence.

Which is the more complete security plugin and likely to cause fewer conflicts/lesser issues?

Do these plugins take care of all the hardening suggestion listed on the WP codex?

http://codex.wordpress.org/Hardening_WordPress