I like some of the furniture from Sanus Systems. I personally have a Euro Foundations unit for my stereo/video and it is very sturdy and open. I like the open design to allow the components air to cool. This may not always be the most asthetically pleasing, however, and modern recievers, dvd's etc. are probably built with an exclosed cabinet in mind. The other Sanus Systems models look sturdy as well, except for the natural furniture. I have seen the natural furniture in shops and it seems fragile. Also, Sanus has matching audio and video furniture so your system could have a consistent look. I think their best performing and sturdiest furniture would be the component line, but some of the others may work for you as well.
https://www.sanus.com/cgi-bin/web_store.cgiGlass has been know to occationally cause problems. I read about one case at an audio show where the glass was causing a resonance problem. The problem on this very expensive system was fixed with a piece of cardboard.