Hey guys...Im thinking about upgrading my amp again as I dont really like the sound of my mB 1500.1. Dont know why I just feel like my sundown 1200 was louder and less power hungry as this DSC. So Im in the market for a more powerful amp but efficient at the same time. I was looking at the AQ2200D and the SAZ-2000d(only would buy if I could get a good price on one used). What other amps are as efficient as these two amps for a good price???