I will definitely check out the Soundstream amp. That thing looks great for the price. I've never heard of them before though. Are they a good brand? On second note, since the two 6.5" I'm putting up front are only rated for 90 watts RMS, (infinity kappa 60.11cs) would 220 watts be too much for them to handle? Obviously, a full 220 would blow them but i could turn the gain down right? Lastly, kind of an odd question considering what we're talking about, but is sound deadening your car (front door, rear deck, trunk) really worth it? Is the sound THAT much better? Was thinking HushMatt. Thanks in advance.