MKB or BKB I can't decide!

[Tsunami]

Black King Bar
Statistics

ATP:590-600
ATA:43
Max Grinder:80
Special:Unreduced Devil's
Required ATP:800
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Double Cannon
Statistics

ATP:620-650
ATA:45
Special: Special attack drains 5% of your maximum HP to fire four purple waves that go through monsters with about 60% the power and accuracy of a normal attack.
Required ATP:900

Double cannon has more ATP and ATA than the Black King Bar. Although, the Double Cannon requires 100 more ATP to equip. The Black King Bar has a better special though...also take note, that neither the BKB or the Double cannon can be equipped by a Ranger or Force....and don't forget, you have to use 80 grinders to fully grind the BKB.