depends on what bass u prefer.my fren using JL with seal box but the kick there not enough.Now they change like mine to rockford 12"8ohm punch series with seal box. Because i still need some kick of soft bass, if hear soft the bass will come out in the front. A fren of mine using 15"rockford double magnet with seal box.15" bass more wider than 12". His sound is good....
SQ song got a lot....sentimental some ppl also consider SQ.
As for my agako temporary no money to upgrade yet but will consider changing the silver RCA cable & speaker wire for my dls to listen more. want to feel the difference 1st. Then later maybe will consider changing amp ( very expensive ).......
Fish, what's your system setup? Can intro pls....