gandalfs sword is glamdring, which means something like foe hammer. its twin is the other elven gondolin blade (which also glows blue when orcas r near...but not in the movies) orcrist, or orc slayer i think. both were found in the trolls lair in the hobbit. orcrist was buried with thorin the dwarf.
now... if an army of orcs was comin at me... id prolly have to pick a jet fighter with a couple o tactical mini nukes, but if i had to pick a middle earth weapon, maybe a cool elven bow (so i cud keep at a distance too)