A Son of Bertha has arrived used at the local crappy music store. I could probably steal it for around 300. My current rig is: Hartke 5000 SWR WM 2x10 SWR WM 1x15 I could: Add it to the low end of my bi amp Add it to the high end for mids and the horn (wm horns are s*%t) Replace the WM1X15 with it for rehearsal. I play a 5 string, and my band does classic/modern rock covers. Should I buy it? Replacing the whole rig (preferable) is not an option.