id look into either of these
amps - hifonics, autotek, audioque, rockford fosgate, diablo audio technoligies
subs - FI, RE, kicker, DC anything that is pretty reputable
and def wanna run something more than 8awg wires like someone else said atleast 4awg to the amps power and ground
my first system a few years ago which was pretty inexspensive was a 15' kicker l5 with a hifonics 1208 amp which was loud and sounded good