I just picked up the corsair k90 keyboard today - things I have noticed so far - it is really easy to mistype because of the Cherry MX Reds. I gamed on it all day however, (SC2/Battlefield 3) and I have to say the response time is quite a bit faster than my crappy logitech (20$ w/ a mouse) keyboard i had before.The keys do not bug me, that much, although i found the Escape key a bit lower than the rest of the keys which bugs me if im trying to cancel units in SC2 and the Caps lock key gets pressed quite a bit. This is likely because I am just not used to the keyboard/mechanical boards in general. The more I use it the more i will get used to the placement.
For me the hybrid composition is not a dealbreaker at all, in fact if it saved me a couple bucks I am happy. I prefer the extra macro keys over the Razer BWU's 5 or 6, and the media buttons/scroll wheel is AMAZING. Worked right away with songbird, which I was surprised as I believed it to be a fairly non-standard music player (vs. itunes/windows media player). This might be more to do with windows than the software/keyboard, not sure..
Overall, build quality is superb, media keys/macro keys are great, typing on it is something i will have to get used to, gaming on it is amazing. I would go for this over the Razer, as I find the razer boards look a bit tacky. If I were to try something else, I would probably pick up the Ducky or the 6vg2 from steelseries, however the lack of backlighting + macro keys on those is not ideal. I also don't like the clicking noise from MX blues, which has steered me away from the BWU.
I recommend this keyboard for sure, but be sure to try it before buying to make sure the rubber dome keys are something you can live with and that you like the general look/feel of the board.
Cheers, happy keyboard hunting.
Ps. got in on sale for $114.99!!! @ http://www.canadacomputers.com/
.. whoah just realized this thread is like 4 weeks old, sorry...Edited by WORLDs - 1/16/12 at 9:08pm