I can only recommend getting a Supermicro cage. I have Aopen (identical to istar, IIRC) at home and Supermicro in the office. The difference is such that I'll probably throw out my stuff and get a Supermicro.
I have a Procase one (5-in-3), and I can say it's noisy..... whether it's noisy compared to others I don't know but it sure is noisy compared to the rest of my system