Here at FreshSites we recommend WordFence for the power of its security system.
WordFence installations are linked together so if another site gets attack, that ip is noted and added to a ban list, so if that ip visits your site, you already have it banned.
In their latest release, 5.1 WordFence now also comes with some performance increases thanks to the Falcon engine!
In the brief video above you will see that performance can increase up to 30-50x on a standard WordPress installation.
From testing we have seen a 0.25-0.5 increase on our WordPress Hosting, so we recommend enabling it on your WordPress account.
If your unsure of how to do this, please contact a member of staff!