Matching subwoofer


I have a pair of omega super xr3s and they sound like a little more bass would really make them sing. I’m not looking for subwoofer bass but just foundation and stronger mid bass presence. The omegas are single driver 4.5” fostex. My question is how do I know which rep sub would be best for the speakers ? People seem to look at room size and recommend. 7i. I was thinking tzero might just add what is needed. Also wonder if the speedwoofer 10s or rythmic 12 would do just as well. This is for 100% music . Amp is a set 45 by Alan Eaton which sounds terrific. 
128x128brianportugal
before you start getting subs, you had made a comment in a previous thread that your room was lively.         have you addressed the room at all with room treatments?
In my opinion, Vandersteen has the best way to integrate subwoofers into a system.
The Debra system is often mentioned, and I know Atmasphere considers it quite good (and I respect his opinion),
But, from my personal experience, I know Vandy subs that are 30 years old, still perform as they should. Though they require the use of an external crossover, they really fade into a room when properly configured.
I am moving to the new Sub 3's and expect the equalization ability to be as good as the 4 sub method espoused by the Debra.
If I had:
The Time
The Money
The Room, 
I would try both systems.
But, I don't.😜
Bob

The best way to integrate subwoofers into a system is to bus them to a neighborhood with no subwoofers.  

My subs are less than two years old. They fade right into the room. With the lava lamp on you can barely even see them.