I thought you were going to go for the 600s Mojo. Or is it a smaller system for the 125s?
May be a mid bass module to flank your larger subs?

Some how I managed to snap the LFE input off my SVS PB1000 something fell behind took it clean off. Sadly they put so much hot snot on the board I can't figure out how to remove or replace yet. I've been using it as kind of an MBM since it doesn't play any where as low as my EP500.