Pan, if you seriously are testing out mods, here are a few i feel are essential in making what i plan happen.

http://www.curse.com/server-mods/minecraft/clearlagg

http://www.curse.com/server-mods/minecraft/worldguard

take a look into this
http://www.curse.com/server-mods/minecraft/essentials

im looking for a permissions mod that will allow me to create unique levels of membership to the server
example

Along with a ranking system for the players.

Also check out McMMO