I am getting ready to buy all the "equipment" needed to check out my speakers and integrate an IB subwoofer. I plan to get a Sound Blaster live external USB card for my laptop and a BFD. My question is about mics and SPL meters. I am new to this and it is a bit confusing. Could someone explain to me the pros and cons of the ECM8000 mic and Galaxy CM-140 or CM-130 SPL meters? Is there any other support equipment required with either one? I assume the SPL can be used by itself to check sound levels while the ECM8000 needs to be used with a sound card and PC to read a sound level. (But it is a lot less expensive) Do both do a similar job for the whole frequency spectrum of 15hz to 20khz? Is one easier to use than the other?