I really like the Sanus six-shelf audio rack I bought (Natural Foundations, I think they call it). Very easy to assemble, lots of airspace, rock solid, no vibration or ventilation problems at all. Also bought their matching TV stand and CD storage rack, too. I use IKEA Expedit shelving for my LP storage, great stuff to which I only added an X-brace in the back for extra reinforcement/weight capacity.
