How about getting 2 Identical Equipment stands, and a 3rd floor stander to replace that feeble center channel.... All under the Plasma... If you put it high enough, and angle it downward...
Unless you are still moving all equipment out of the room, then there is no need for the Equipment Racks, and you could put some beautiful tall plants there inbetween all 3 speakers...
Now you have the ideal layout of speakers on the front wall.... No need to worry about wall mounting the center channel...
Of coarse if you already have WAF issues, this may not fly...