I was lookin at the xenon 600.1. is it truly 600 watts RMS cus on the PG website it said 600 watts 1-4 ohms. but ive read on other sites that its 300 RMS and 600 peak. can anyone tell me how good of an amp this is? also, if its not true 600 watts, are there any other amps that are in that price range?