AQ HDC315 VS RE SX vs SSA ICON pair of 15"

[MasterOfAllBass 10+ year member]

i have them on a dd m3 right now but also tried them on 2 ia 20.1 ,hk802sx,hk4000d,and massive 3000.1

i want a dd m3 but the cost is high. not to dis anyone but i use to own ma audio subs and amp and they ****.