Doesn't appear that Abe's is an authorized dealer. Probably why they are offering the warranty to the denon.
But about the speakers... As you can see from my sig, I basically have the same setup besides surrounds and sub.
When you set up your system DO NOT use the auto calibration. Set it up manually, setting the crossovers for the following:
5C = 60hz
5B = 80hz
4B = 100 or 120Hz
Turn sub crossover to full and volume on sub to a little less than half..
If you receive a SPL meter with your setup you can then use that to set your speaker levels. I guesstimate the distances.
With that receiver you will thoroughly enjoy those speakers
.. I know I am..