15" hifonics olympus 3500 watt subwoofer? - subwoofer amplifier a/b or d

try to install a new system in my car. heres the start.

Pioneer Premier Car Audio

Sub-2 Hifonics OLM1615 Olympus 15 "3200W Dual 2-Ohm Subwoofer

Door speakers Cerwin Vega 69 6 "x 9" 2-way speaker 200W

tweets "Cerwin Vega V-MAX 1.0 1" dome tweeter 100W with CrossOver

sub-amp Hifonics XXV Colossus dedicated high performance Class D-2-Channel Amplifier (3500W x 2)

Speaker and Amplifier Hifonics Txi Door Peep-4408 440-Watt A / B Class 4-Channel Amplifier

The total cost is about $ 2010.00 with installation kit and amplifier capacitor.

My question is, I've never used Hifonics and I'm buying a little doubtful about it. "You did so good, reliable?