Get some JL audio.. Im running a 12 inch jl w7 in sealed jl box with 1500 watt kicker mono amp and i love the way it sounds. I got all the things cheaper than you can now..

What i got it for:
JL W7 12'' - 200
JL W7 Box - 50
Kicker 1.1500 amp - 350

Retails new

Sub - 800
box - 125
amp - 650

Look on the local ads for cheaper stuff you can come across some new stuff like i did for cheap