It was almost five years ago when I purchased my first aluminum case – a new Lian Li PC-68 (which still houses my main PC today). At the time, Lian Li was the recognized leader in high-quality PC enclosures and was one of the first manufacturers to bring premium all-aluminum cases to the enthusiast market.
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http://www.systemcooling.com/lian_li_pc-7b-01.html