I am a huge fan of BOLTZ Furniture media shelves. They look great, are all-steel and extremely sturdy, made in USA, and are a modular style that can be expanded infinitely in the future. There are a few versions available... one style sized for CD's only, a style sized for DVD's/Blu-Rays/VHS/etc, and apparently a newer style that is "just right" for BD's as well. Each of those models is available as a short 3 1/2-foot high version, or a tall 5 1/2-foot high version, plus a few different finishes are available. You can purchase them new from the manufacture's website (fairly expensive), but sometimes awesome deals show up on craigslist for used units great condition.
Disclaimer: I am not employed by nor receive any compensation by BOLTZ; I'm just a user and fan.