I’m about to push the button to get 2 SVS 3000 micros to add to ATC SCM40s.

OK, try facing the subs toward a wall with about a 3 to 4 inch gap. There are room treatment panels that are portable as well. I use one in an open doorway in the back of the room and move it out of the doorway when not listening. 

The other thing to try is the DSPeaker 8033II sub equalizer which would help dial it in. Give the subs time to break in before changing anything though.

https://auralex.com/shop/portable/

Yes, try one driver facing the wall, the other firing into the room,

Congrats m669326, please do a follow up once you have them installed.

Subs do take time to break in, you may need to use bass traps to get the bass just the way you want: