I am currently running a GK BL600 with a Peavey 215 cab with part blown Blackwidows. Option 1 is replace them-$350 for both. Option 2 is maybe get the BL115 and BL210 cabs as a matching set to go with the amp. I know the Peavey Blackwidow twins have the low end, and plenty of power-will shake everything off the walls. Are the GK cabs [together] comparable to the 215 Blackwidow twins for low end? If I get the GK cabs-will I be happy or is there an option 3? Thanks TBers