Both the Hsu and SVS subs are very reliable. I wouldn't worry about that, they should be at least as good in that dept as your Klipsch.
If you are near Anaheim, it might be worth it to drive on over to Hsu to pick it up and save shipping. You will want to schedule a visit with them to pick it up though. But be careful, don't go into their demo room, or else you will not be happy with anything less than their 15" subs. Once you hear one, there is no going back.
Honestly, if you have to pay for both shipping and tax on the Hsu, that might tip the value scale on over to the Klipsch sub. From the available measurements, it is not quite as good of a sub, but it is not that much worse. I really like the VTF-2, seriously, but that deal on the R1115SW makes it hard to beat in terms of value. They are more alike than different in performance.