I've always questioned the issue of the equipment rack between the speakers.
1. The speakers are already further from the back wall than the equipment stand
2. The speakers fire straight down the line. Slight toe-in
3. The illusion of the "third speaker" or soundstage is created by the brain's perception of sound waves hitting you. That center sound image is not actually coming from between the speakers and therefore should not be impacted by the equipment rack.
I may be off base here but I think my logic is sound. The center rack should not make any difference on most systems?