I had one. kinda hard to play, and if you want to use throwing lances / javelines (...) in addition with the spear and buckler, well, it might not be possible after next patch with multi slots items. bucklers are not very hoplite-ish, I'd prefer elite cavalry shield, eventually huscarl, or board shields for a more roman triiari style. But hey, your character, your choice.
As for the spear, th awlpike has a better pierce attack, I'd say it's better for support and use with a buckler. The advantage of war spear is it has side swing attacks once you fight without a shield, the awlpike has only vertical/thrust. Depends on what you prefer I'd say, and try both if you're not sure.