MRP-M500 - Alpine Monoblock 500 Watt RMS Power Amplifier
I purchased this along with 2x SWR-1243D subs and a Pioneer AVH-P8400BH head unit.  Easy installation, quick disconnect power and speaker connections and gain control.  Works beautifully and is not too flashy.  One issue I ran into was my head unit says it's 4.0 volt line out and this unit has 2 settings, 1.0-8.0 volts and .1-1.0 volts.  When set at 1.0-8.0 the bass was barely audible even at full volume...  Switching to .1-1.0 made my subs BOOOOOM!  Definitely a sweet amp.