So which of the two is a better choice? The BC new makes 1k more rms for almost half the cost of an saz-4500.. But Is that true rating or is that BS? I havent played with Crescendo yet. Im looking to power 2 12" AA mayhems. As far as electrical goes I will have a mechman 270 amp Alt with 2 G31 batts (undecided yet). So any one got any experience with either? How do they stack up next to eachother?