Well I am about to start getting some new equipment and some more powerful stuff then usual. Already have a headunit and big three/around 50' of 1/0. So with the $1500 i have saved now im going to buy a new amp/batterys. Ive been looking at a Soundstream X3 4000 but really have no expierience with them and dont know how they perform. If anybody does and wants to spread some info that would be cool, or if they know of any other 4k+ amps for around $500-$600.