From a very quick search, I found this:
http://www.amazon.com/Salamander-Designs-A5-Archetype-5-Shelf/dp/tech-data/B0006VPUOY/ref=de_a_smtd
http://www.amazon.com/Salamander-Designs-A5-Archetype-Cherry/dp/B000M5HHEA/ref=sr_1_2?ie=UTF8&s=home-garden&qid=1301088539&sr=8-2
Please note, I have no experience with that brand. But they say solid wood for the shelves, with metal pillars, giving you very good ventilation. And they say you can put 250 pounds on it. (By the way, never trust maximum ratings for such things. It is a good idea to get something that is rated to hold substantially more than anything you will actually put on it. Probably about double is a good rule of thumb.)
I personally also like to see furniture before buying it, so looking for a local dealer might not be a bad idea.
Obviously, if you are good with wood, you could build something yourself. And if you are good with wood, you could make something better for less than anything you could normally buy.
The living room rack that I am using was made by Wood Technology, but after mine, I believe they started making them with particleboard sides, and now they only have the shelves and trim of solid wood. (If you like the style of theirs more, I would contact them to see about the sides. I personally would rather have metal pillars than particleboard sides, but you must decide for yourself how you feel about such things.)
On the other hand, if you like the look of something enclosed, you might be able to find something with an open back that would let out the heat.
Obviously, you don't want to set anything on top of something that gets warm, and you want plenty of room above it for the heat to escape, particularly if it is in an enclosed or partially enclosed space.
If there is a Cost Plus/World Market in your area, you might also go take a look at:
http://www.worldmarket.com/product/index.jsp?productId=3909374
You could put any gear that gets very warm on top, though you might be okay putting it inside, depending on how well it holds in the heat. The price is quite attractive, considering that it is supposed to be made of solid wood.
Obviously, you will want to make sure anything you buy is deep enough to hold your gear with the wires attached.