I've got a 5150 combo and I run it into a Marshall 1960AX top (greenbacks). For 80's type of metal and fusion and most shred I love it. For my 7 string I'm not so sure if the greenbacks are a good match for the lower range. what do you guys think is a good speaker match for a 5150 and a 7 string. playing stuff like Nevermore/Planet-X/Arch Enemy/Inflames/Dream theater/SYL etc. muchos gracias.