Kicker - 2 L7 15" or 1 SoloX 12inch?

[raja_killer786]

some help me please to choose which one to get. ive allready had x2 Kickers L5 15" now i wana upgrade to higher system.

 

[edwards1337]

deffinatly the 1 12" solo-x.. if possible, get the 18 lol