Let you in on a little secret... We use Wordfence, and for some very good reasons. Oh, Wordfence is no secret by any means, it is a feature packed security plugin and, in my honest opinion, the best. Our sites, forgive the possessive tone, have been problem free with Wordfence (One site quickly approaching 1500 users). Not that we haven't had hackers, you should see what some people try to log in with, so there is the tech entertainment value too. We strongly recommend Wordfence to all our clients.