I wouldn't use wood near any electronic equipment, unless the insurance agent is a friend of yours ;-)
(In event of fire, regardless how much care you took, the insurance will not pay if they know you used wood)
To each his own I guess but I'm absolutely confident the wood wouldn't make any difference that aluminum would in case of major failure.
I can't take pictures at the moment but it's similar to this random picture but bigger and mine doesn't have a wood panel on the bottom:
http://i.imgur.com/njJH6sT.jpg