Gary, the lack of room correction for the sub channel(which is probably the frequency range needing it most)is a major reason why Pioneer receivers aren't among the ones I suggest.

Since you're planning to use two subs in your 9.1 setup, there's a possibility of reducing room effects by proper placement. This generally involves placing them in locations with opposing acoustic properties(i.e., midpoints of opposite side walls or of the front and back wall or in diagonally opposite corners). Using "one of each" however, isn't favorable, since the benefits depend on opposing symmetries.

If you could place one in the left front corner to match the one in the right rear this would be a better idea.

Enjoy the music, not the equipment.