So Im fairly certain I want to add an equilizer to my collection but and I really dont know what I sould be looking for. I have been eyeing a GR-777, SG-300, and a SG-9500. I like the new look of the GR but Im thinking about staying with the silver faced Pioneer equipment. How much of an affect does the EQ output have on my system? Does either of these models have an advantage over the other? Do you have any opinion about these models? Thanks.