I have a Pioneer P5750 HU and for the money you can't go past it. 3 pre outs, sub control with variable frequency. MP3/WMA playback functions and i have no problem with it dimming on big bass, this mainly caused by drop in volts due to a small battery anyway. But as CerealKiller said dont look past the JVC either. Good HU's with plenty of strong features and a competitive price to mach. The Apline being a good HU but your paying for a name really. At the end of the day its what you like and suits your needs not the recommendation of somebody else