I'd recommend staying away from Corsair's peripherals due to concerns over durability, and their atrocious returns process.
I'm currently using the Corsair M95 and a K95 that I had to duct tape the cord down on. The cord failed within two months, causing an intermittent connection. Corsair refused my RMA because I hadn't kept the receipt, something that no other company has given me a hard time about for an RMA (typically it's only needed by the store and for returns only, not by the manufacturer for RMA).
They initially tried to say that it was so they could be sure it was within the warranty period, until I pointed out that the keyboard hadn't been on the market nearly long enough to be out of warranty. Then they told me it was because the warranties were non-transferrable and they had to make sure I was the original purchaser. When I asked them what would stop the hypothetical original purchaser from just handing me the receipt when he sold the keyboard, they had no satisfactory answer at all.
Corsair's refusal to service its products without a receipt is just a way to cut down on the number of claims they have to pay out. Oh, and if they do accept your claim, they charge you $20 and shipping.
Buy from a company that will stand by its products instead of looking for excuses to not have to. It shouldn't be an uphill battle to get a replacement for a top of the line, two month old keyboard.