OK may be a loaded question but I have to post it. I have a Memphis ST500D sub amp and am happy with it and have heard good things about Memphis, so I am planning on going with a Memphis 16-MC 3004 that is 75 watts X4 at 4 ohms. I am going to be powering two 6X9 and the two 6.5 door speakers. Don't know about the brand of the 6x9 just yet there are only a few that will fit in the factory 99 Blazer 2 door zr2. But I am pretty sure I am going with Infinity Kappa Perfect componants in the front doors. However I don't want to go just with brand if there is something better out there for me. Anyone have any suggestions? The one place I found these Memphis amps at, which is ebay place indoaudio I don't like the look of some of their feedback and they are the only ones who have these amps. Any other suggestions would be greatly appreciated!!!!