The reason I like the Outlaw M8 is because it was designed by Dr, HSU.....and I'm biased because I've owned 5 HSU subs,
and they were all very musical, and good for home theater also. Amazon has an M8 for $250.00 with free shipping.
The rated specs are 29 to 250hz. Very similar to to an HSU STF-1. It's down firing, but that makes no difference with
subs,,,,they can be front firing, side firing, etc...bass below 80hz is non directional. Bass radiates like a ripple in a pond,
no matter which way the driver is firing....Amazon link: http://www.amazon.com/gp/offer-listing/B005SRS7XC/ref=dp_olp_0?ie=UTF8&condition=all
The Klipsch RW-12D is a great sub for the money, but I think it is geared more toward home theater (someone correct me if I'm wrong).
It's enclosure is mighty big, which could be a drawback in your case. But at $270/$300 it's a fantastic deal. Graphicism, you might think
about the future and a home theater, and the Klipsch is one great deal for a home theater....I just can't see this as being for an office. !! x 12 x 8 is a very
nice size office space, so perhaps the Klipsch would fit in. I've heard the Klipsch, and it sure can put out a lot of clean, deep base.
Mirage S8 is a "very musical" sub....(think refined). That's why I recommended it.
In the end, all of these subs have a 30 day trial period....so make a decision, and if you're unhappy, simply return it.
And I also recommended the Lava, only because I think Lava subs are underrated in general,
Edit: the Outlaw is $32.00 shipping