Well on some real critical listening with the CD player (I hadn't been listening to all that many CD's as of late), it became apparent that they were not as centered as I had thought. I was normally listening to more fuzzed out rock, that can tend to blur the imaging a bit. When I put in a more mellow CD, I was able to tell that the sound wasn't centered. So from that, I positioned the speakers to fully focus the sound.
I guess I was trying to keep the speakers perfectly symmetrical, but my room wasn't having any of that. Live and learn, I suppose.