Got my case yesterday. Intial imperssions (to be followed by a full review at SilentPCReview) are:
1) 2" taller and deeper than the SLK3700. All 2" of height is above the PSU leaving a 2" dead spot up there. It's needed in order to have that I/O panel at the front/top of the case.
2) Very nice thick aluminum construction throughout the case. Top quality job here, way better than Lian-Li, as good as or better than Coolermaster.External surfaces appear to be covered by a protective clearcoat.
3) Removable mobo tray actually comes out the side of the case, not the back like on most other removable-tray cases. A little bit of a PITA to get in and out.
4) Much better ventilation around the front fan opening/bezel area than the Sonata, should be much less constricted here than the Sonata but I can't speak about any additional noise yet. Room for only a 1" thick fan in front, no L1A Panaflos need apply here.
5) Nifty flip-open color-coordinated CDrom covers and a color-coordinated FDD cover.
6) Front bezel pretty busy and all plastic. A large portion of it is "chrome" plated which, if the Sonata's chrome is any example, will start tarnishing after a while. There's an easily removeable, washable air filter on it.
7) Extra bling for free!! there's 3 LEDs buried in the intake slots on the bezel. I don't know what color they are since I haven't put it together yet but they are definitely there.