Picked up a used rack mount M6 at GC. Sounded earth-shattering through the 4x10 cab in the store. 
I'm hoping the more scooped tone of the M6 will blend with the VERY mid-forward tone of the Bag End S15-D to give a more balanced tone without major sculpting.
The only thing that worries me is whether the thing will go QUIET enough - the amp was definitely ballsy, and the Bag Ends are verrrry efficient.
Taking it to an outdoor gig tomorrow (if the place doesn't get blown away in a tornado tonight) - but also taking my Aggie AG500SC as backup. We'll see how it goes...
Scott
I'm hoping the more scooped tone of the M6 will blend with the VERY mid-forward tone of the Bag End S15-D to give a more balanced tone without major sculpting.
The only thing that worries me is whether the thing will go QUIET enough - the amp was definitely ballsy, and the Bag Ends are verrrry efficient.
Taking it to an outdoor gig tomorrow (if the place doesn't get blown away in a tornado tonight) - but also taking my Aggie AG500SC as backup. We'll see how it goes...
Scott