Here's another recommendation for the IKEA Lyte rack. I built one for my turntable set-up and am very happy with the results. I am far from a DIY kind of guy, but the instructions provided by Ken Lyon in that thread are detailed and meticulous, and it was very easy to assemble. I "cheated" somewhat by ordering the spikes from Parts Express instead of grinding them myself, but I was still able to get out for well under a hundred bucks, all materials included.
By the way, toward the end of that thread, one of the posts indicates that the IKEA table legs are now hollow and that plugs have to be made when they are cut to size. However, when I ordered the tables just a couple months ago, I found the legs to be solid, making the job easier than I expected.
The rack is light, rigid, reasonably attractive, and very inexpensive.