Thank you for your input.
I fixed the odd sounding bass problem by attaching rubber feet to the speakers. They were both on plastic surfaces that were amplifying the low vibrations. I also adjusted the crossover and volume of the sub to 150HZ and finally found a perfect balance. As for the price, I based that on other ebay auctions that I saw for the rti 28s.
Finally, maybe someone could recommend a quality satellite speaker pair to replace my insignia surrounds (result of a Best Buy gift card).
I have a pioneer vsx-921 receiver by the way.