I have an Autotek xs 550 watt amp and I'm looking for a sub to go with it.The 2 that I'm looking at are the Diamond Audio CM3 and the M6. The cm3 is 500 rms and the m6 is 800. The M6 is a better sub but will I get more out of it than th CM3? How many watts will I need to get full output from these subs.