Personally, I think that the SVS finishes are hideous and stick out like a sore thumb. But that's just me. They're also huge.
The Hsu is smaller. On the other hand, my sub gets fairly high WAF because, "It's a piece of furnature." (It's a Cambridge Soundworks Subwoofer 1; a vertical design.) Similarly, pmbuko's SVS PB1 gets high WAF because it's sort of hidden behind a couch and under some stuff. If you can find a place to put it where it sounds good and is out of the way (and then stuff can be put on it) you might be ok. You could also look at the Sunfire True Subwoofer Jr. (they have impressive specs, and are teeny, but I don't know how they sound). That's only about a 9 inch cube.
