As you know I'm involved in this issue with a subwoofer and amp. A side branch of that discussion is what is the deal with all the speaker ratings stuff? We've got:RMS, AES, Program, and then my sub lists "long term system power". What's the deal with these terms? Why are there so many? I tried to read about AES vs RMS and just got confused. Is there a reason we can't just have one standard rating for speakers? Help! I want to understand.