i have duals (more mp, hp, cp) and weapon with acu (more c.speed)... with iss buffs + sonats my c.speed is 1600 with duals and 1850 with acu... im aeore from ee.
for me duals are more use in pvp etc coz of those cp/hp/mp bonuses,gun with acu better when u are in xp mode
a good post concerning armor + weapon on this forum : http://boards.rochand.com/viewtopic.php?f=32&t=752