AudiAV.com
Grand Prixs are really cool looking, but try shaking the top of one when it's got gear on it, they are pretty flimsy...
The best rack I ever found are the Harmonic Resolution Systems, but they are like $20,000- $30,000.... Another one I really liked are SRA Craz rack, but I needed more shelves so I went with the audiav Crystal and it is an amazing rack!