You can look at buying the Pioneer sp41 speaker, which has decent bass.
I would skip those 2 subs, and put the money towards a receiver. Then,
save up for something like the Energy S10.3 subwoofer. A nice step up
ffrom your Klipsch system.
Who and Where - is the Way, the Truth and the Life?
Speakers > MB Quart VS05, Boston VS260, Snell K7
Subwoofer > Mordaunt Short Aviano 7
Receiver > Tascam PAR-200, Pioneer VSX-30