Why not Nuke? I've made my third project in it and I find it awesome. Tried Enigma, Xoops and Mambo, plus others I don't remember. They were all not so OK. I've got 2 sites in Nuke 7.5 and the last in Nuke Platinum. It rocks. Once you are able to understand how it functions, there's no limit. As for security, there are many options and addons.