two BL 12"s Vs four Kicker L5 12"s

[herbykw 0]

I am going to change up my system, and i am trying to decide between two FI BL 12"s or four Kicker L5 12"s. I listen to mostly hip hop and rap, with some rock. I currently have 2 15" L7s, being powered by a MA AUdio HK802SX amp. I am going to upgrade the amp.. but it kinda depends on what sub setup i go with. I have just over 6cuft of space to play with... So what do you think, 2 Bl12"s or 4 L5 12"s? What will give me a better sound for all types of music? Any amp recomendations?