Cooler Master have just introduced a new mid-tower chassis they call the Mystique 631. As well as being built around a tool-free design, theres also rear retaining holes for liquid cooling kits to be paired up with it and some other nice touches.

Grab Cooler Master's official announcement here for further info.

Mystique -- Fascination, Attitude, Mystery are the perfect words to describe the identity of Cooler Master's new chassis series. The excitement and sense of achievement PC Modders sought after can all be found in this all-in-one package of elegance and sophistication. The notion of simplicity and versatility presents vast opportunity for you to expand you imagination. We emphasize on the attention to details and materials to accomplish a visual satisfaction and deliver sensational experience.