I love my Corsair K70, aside from the switches (Cherry MX Red), but that's a personal preference so I won't ramble too much about it.
The back board is metal, the key switches sit
above the backboard which makes it incredibly easy to clean if you have a tendency to eat at your computer
- You could quite easily pop a bit of canned air under the keys without having to remove them to clear dust etc.
It also has a really nice media scroll wheel which I wish more keyboards had, it's my second favourite aspect of the keyboard... It may seem small and insignificant but if you change between a lot of audio sources often, it's easier to use that than it is to change the individual volume of said source. A little button to the side to mute it entirely, too.
My only downside about the keyboard is the CUE software, but I'm not sure if that's necessary if you don't get the RGB model. The CUE software isn't that bad but it becomes a little tedious from time to time.
Overall, great keyboard. Epic build quality, raised keys which don't sound good until you see them and clean them in person, media keys, and Corsair's CS makes this a great keyboard choice.