Right now I have a Kicker KX450.2 amp powering my subs which, tomorrow, will be 2 Arsenal 12's. The max fuse on that amp is 60 amps and it is pushing out about 250rmsX2 at most. I was thinking about later this year switching to an Orion 600D or whatever. It is 600rmsX1 @1 ohm. I need it to be either 1 ohm stable or powerful at 4 ohms for a decent price. How would the Orion compare to the kicker? The orion only has a 50amp fuse so it would draw less power and produce more, which is a plus. Are they probably underrated?