wow, i can't believe you have two more than capable amps and your selling them for the opti 2000. I bet you won't even hear a difference between that amp and the zx1500.1. As for the zx2500.1 all you have to do is keep the gains down and you'll be fine. I just see no reason at all to sell those and buy a opti 2000d.//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif