I wouldn't suggest to use Enjin, yeah you can connect it up easily to your server but you can do the same with nearly every forum system out there (With a bit of know-how sometimes required) using easy to set up Bukkit plugins. Enjin will only make your site look cheap and shows your players that you couldn't really care less about your website - which you've shown you do by creating these custom pages.
Other suggestions for your server:
http://dev.bukkit.org/bukkit-mods/linkme/You can use Link Me to offer easy commands for your players to see and click your website link, as well as any social networks you use.
http://www.spigotmc.org/threads/1-5-2-bungeecord.392/You could also consider using Bungeecord to link your multiple servers together with a main hub server to give your players easy choice upon login. This also comes with a vast quantity of player management plugins to make your life easy.
Other suggestions for your website:
http://dev.bukkit.org/bukkit-mods/statistics/Try hooking your server up with something like Statistics which displays a great selection of in-game and server stats on an editable but fresh looking webpage. Works perfect for PvP and survival servers.
https://www.cloudflare.com/Look into signing up for Cloudflare, they provide your website with increased speed and security, have a read up about it anyway (Your webhost may offer it too).
Hope this helps
