Maybe I could get a smaller sub that is still capable (in addition to my bigger sub) and that could help even out the bass response in my room.
Prior to adding my second EP-600 i was using 1 EP-600 + a JBL 8" sub.. There is no comparison between the 600/JBL combination to the 600/600 pair... I would tell you to get a second SVS sub like the one you already have, which one do you currently have btw?.. My room is 2400 cubic feet, and opens up to the kitchen as well as the entry way and the formal dining room.... So, my space "gobbles" up bass as well, the second 600 made a world of difference, it's not "in your face" but more filling, the correct amount of sub for the space that i have if you will.
Good luck.
