In-Win Releases G7-Series PC Cases
In-Win has announced a PC case that offers a sleek exterior and a roomy, feature-rich interior.
In-Win's new G7 chassis is built using brushed metal, has a meshed side panel and will be available in both black and silver. The ATX sized chassis supports both ATX and micro-ATX motherboards, multiple graphics cards (up to 408 mm) and extra long power supply units. Also included are 7 expansion slots, over an inch of cabling space and a top-mounted EZ-swap bay that allows users to hot swap 2.5" and 3.5" SATA drives. 
Beyond this, the G7 has grommets for water cooling tubes, air filters and space for a total of seven 120 mm fans with two on the front and sides and one on the top, rear and bottom. The front header features a single USB 3.0 port, two USB 2.0 ports, HD audio and a two-mode fan controller.
Unfortunately there is no word on availability or pricing yet, but based on the company's history we don't expect this sleek enclosure to be overly taxing on your wallet.
I do not think the system being off will cause dust to enter the side of the system. I could see dust landing in the top vent.
this is every bit the improvement i would have made to beat the antec 1200's
some day soon they won't be needed, can't wait for that day to get here so the form factors can shrink as well. in the mean time, more hot swapable HDD bays for storage!
I am not sure if this case is designed to work with positive pressure.
As long as the intake is filtered(you would have to filter the side intakes your self as I do not see any filters.), dust should be kept down fairly well on any positive pressure system.