hmmm, I wonder though, if with 2 sets of rears in such close proximity to each other, if there wouldn't be some sort of weird effects when seated in either row.

Guess it should be fine, as I imagine this is how movie theaters are setup.

I'm hoping with the quad-polar speakers just 2 rears in-between the 2 rows would suffice. Given that the majority of the time the back row will be empty anyway.