Your system will still benefit as the PDR-10 will be able to provide higher output and lower distortion at those frequencies. Also take into consideration room gain that will extend the sub a bit.

Even though you are not looking for earth shattering bass with your budget I would still save a bit more and at the very least start with the Paradigm DSP-3100 ($800CAD) or the SVS PB-1000 ($700CAD)

I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne