I like my Corsair K70 that I've been using for about 10 month alot. Coming from MS Ergonomic Keyboard that I used for nearly 10 years, I was skeptical of goning back to the traditional key layout, but since I really don't type that much, losing that split and sculpted layout hasn't been too big of an issue.
The back lighting on the K70 is very flexible as it lets me turn off majority of the LEDs. I only have the E, S, D, F keys lit. It looks very sharp, crisp, and over all professional for a gaming brand keyboard. The mechanical switches feel concise, and the feedback is fantastic. The cable is braided, which looks fantastic, but it's awfully thick. (I guess it's for the USB). I do knock little things down with the cable as I move the keyboard around often.
It's not cheap, but everyone measure value differently. Aside from unforeseen mechanical failure, I'll keep this K70 for another 10 years.
I'm about 30% CAD, 30% Photoshop, 30% gaming, and 10% web browsing, FYI.