I use 2 Salamander synergy 40 towers and 2 bridges linking the 2. Works and looks great for equipment. Also the flexability is great as you move/get/remove equipment around.
The problem I have is media storage. I use the drawers for a while for CD's and DVD's but I quickly outgrew them. I have also have over 600 LP's that I need to store. Nothing I've seen so far helps in that area.