Metal, aluminum, or wood for a rack ?

You guys all have some nice looking racks. ;-) Are you looking for improvements or just a different look? I ask because I'm leaning toward re-doing my racks also. In my case I have found better results with using products like rollerballs and Stillpoints so I'm thinking of getting rid of all the sandboxes except the one under the turntable. And, I'd like to get things down lower to the floor. It seems that the first thing is that the stand must be rigid.

Very nice job indeed! Your work has given me some ideas for a new rack system. I think I may try alternating layers of 1/2" mdf and 1/2" plywood.

;-) I was just following your FR thread on DIYaudio. More ideas. I gotta stop! ;-)