wood one for now and I'll be looking at building my own wire rack in the next month as well. For now, I have a good amount of rescues coming to me and I need to get at least a couple racks done and I'm running low on time to think about more sizes. LOL! I have the specs and just need to go out tonight and get the wood! :D
I love that option though with the wire rack and will certainly be looking into it VERY soon! Thanks!
:if you have a Container Store near you, they sell the posts and various sized shelves so you can make your own to your liking. These wire shelves are really easy to put together and are easily adjusted if/when you need to. And the heat-conduction benefit of the metal shelves is great.