Arrange circuit breakers in panel

Hello
           I've been following the discussions on this forum for many years, first time I've posed a question. I am in the process of adding two more dedicated lines to my rig. I was wondering, has there been a consensus on the best location, within the main service panel, of the placement of the audio/video breakers? I realize load balancing will dictate space used, but I've read that folks will place double pole breakers at the top of panel (in my case Square D QO 200 amp main panel) and some prefer single pole breakers toward the top. Has anyone experimented, come up with a better arrangement of the breakers? As long as I have the panel open, thought I might try to squeak a little more SQ out of the rig. Thanks.