Looking for some opinions and advice. My current rig is an SWR 350x and an 8ohm Goliath Jr. III. I'm now ready to add a 15" for the low end - which one should I get? The 3 i'm currently considering are the SWR Son of Bertha, Eden 115xlt, and Aguilar GS115. I play funk/jam rock. Thanks for any opinions!