Wtb: 15's Or 18's

hey guys im looking into getting a new sub im looking into some higher spl subs dont really care about sq heres a list:

RD Alpha or Heavyweight 15''

Tc Sounds TC 3000 or LMS 5400

Incriminator Anything from the lethal injection series up

Atomic APX or APXX (really want one of these)

Hifonics OLM2415 15"

RE SX, XXX

FI BTL

AUDIOQUE HDC315 or HDC318.

i have about 300$ to work with and can add A nice memphis 4ch. amp