Me and a friend of mine are looking to start getting together and playing games over a LAN, possibly getting some other people together to play with us. He likes RTS games, so I have a small list of games I have played, I wanted everyone else's opinions on these games I have, and any other game suggestions you guys can give. Nothing top-end

Age of Empires III (Good game, some of the game mechanics sort of bother me.)
C&C3 (Another good one, gfx can lag a little, but I'm about to buy a better computer.)
Civilization IV (He plays this one, lol, I've never played it at all)

Any other suggestions?

Mech Warrior, ok its an old one but i played that once at a LAN party and it was great