I don't think I'll ever go any bigger than 1500WRMS in this car. I'm thinking the 180A is pretty reasonable. I'm not buying anything until I can get my Big 3 done, and better runs of power and ground. The only reason I am wanting to know is that I just installed my 1008a's paired with a Directed 1100D, and there for a while they were loud, and were moving a lot, and then they cut out for some reason, and playing again, just not as loud. I checked the voice coils, and they're still reading at 4 ohms each, so it's not the subs. The amp is working great though, 'cause I hooked up an old SVC 4 ohm Volcano 12" and it was great.