I have also considerd the large sized wepon route. I have a ranger stearing down arcane archer and going from 1d8 to 2d6 seems little until you add your feats like many shot and rapid shot, and your extra attacks. Also using the spell from the advanced players gide gravity bow whick makes all of your arrows do next sized wepons damage so 2d6 become 2d8 for 1 min (20 rounds at 3 sec) and my level 7 can shoot 4 aarows a round so my potential 4 1d8 aarows become 4 2d8 arrows potential 32 becomes 64 and add percision damage and other modifiers like a fire bow's 1d6 a turn my potential on a good turn becomes (including +6 damage from all my multipliers) a hopeful but unlikely 128 damge a turn without crit. Also if everything hits but rool 1 on all my damage it becomes 35min damge. And every levil i keep going up.