i like glass just cover the top with rubber mats it keeps the humidiy and temps just fine, the mat i use is actually made for tool box,s to keep tools from rolling around you can find it at homedepot or shucks auto supply its cheap last,s forever and very pliable and the kicker is it actually clings to the glass so if you wanna cover the back or sides its very simple to do you might need a little double back tape at the top but thats about it

i really want a rack though just for space and ease of use
though they dont look near as cool imo