Not knowing which Klipsch sub you're referring to makes the suggestion slightly more difficult. However, having had experience with both Klipsch's Reference and Synergy subs as well as the next step up from SVS (20-39 PCi), I'd recommend the SVS for low-end and build quality.
If size is an issue for you, the PB10 isn't a little guy, but if you're not terribly restricted, I'd prefer the SVS over the Klipsch personally.... -TD