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.
Yeah I use wood too. Wood has a pretty high point of catching fire. It's a great insulator against electricity and heat up till that point.