This is actually not a bad price at all. Yes, it does have this Oreo cookie effect going for it, but it is far from being ugly. Considering the fact that the black 600T goes for around $150 shipped before any rebates, there is only about a $30 difference. If you think about it, once you factor in the price for a window panel for the black version, they actually total to the same amount of money spent when all is said and done.
I had the luxury of building a computer with the black 600T recently for a friend, and I will say this: it made me take a real hard look at my own 800D and consider switching!
The 600T is smaller and VERY much lighter than my 800D, but yet, it still maintains a solid stance when fully assembled. It can even comfortably fit a Tri-SLI/Crossfire setup by allowing you to install a dual-slot card on the bottom PCIe slot, thanks to an extra slot for it to exhaust the hot air out of the case. The greatest part of it was that the cable management is every bit as good with this case as it is for my 800D.
I've worked with a number of other cases over the years, including Cooler Master, Antec, Ultra, Rosewill, Lian Li and even some random generic brands, and I have to say that Corsair has always impressed me right out of the box. Make no mistake about it, they are a premium brand that stands high above with the likes of Lian Li. While there certainly is a price premium associated with it, but you are paying for a quality component and very good customer service to back it up - something that is lacking with a lot of other brands when it comes to buying cases.
So if you were already looking at the black 600T, and looking to buy the windowed side panel, the new 600T SE is worth checking out (assuming you like the color scheme). Corsair have made little tweaks and adjustments with this version, including an improved fan controller that has a wider RPM range.