I have two 900.2 Xtr's. One is the silver heat sinks (sides) with black middle. The other is black heat sinks with silver middle. I will be using one of these to power my 12's. I need another to power my components. I was looking at getting something like the 500.2 or even anothe 900.2. I want one that matches my current amps and then I will sell the other. So anyone have one?