the SAZ-1500 is a great amp, but i want an amp that cam make rated power from 1, 2, 3, and ohm loads. like a jl or a JBL crown series. Just b/c that would be more convienent for me. Also i dont have alot of $$ to spend on battery back up, so w/ the JL i can get by on not spending that must money on an extra batt. example instead of getting a 3100, ill get a 5100 to match my from batt, for a JL1000/1. When i buy a hoopty, that i wanna wall off, then ill work w/ bigger amps, batts, and current draw. It bassically comes down to money. I know my SAZ is worth more then a JL, consequently, i wanna see if i can get alil moeny, whille filling my needs thats all.