you don't even know what to do with 6900k and probably never will use it to it's full potential (it's like buying a bus to drive to your work, it's not practical). Try 7700k or even 6700k. You can find even 2600k kicks in games compared to amd and price is even lower. We are talking here about gaming and fps and intel still is best for that hands down. And it's more then just few fps and even if that would be few fps we are spending extra money on aftermarket coolers to oc cpu to literally get few more frames. We spend more money on a better mobo to have better components to handle better oc's, same goes for good psu and faster ram.
To me this all sounds like people who never could afford i7 now find an excuse to moan about. Because I personally know none who own even higher tear i5 would complain about cpu alone. Clearly there is no point arguing with hype and fanboys so I'll leave it here. Smart will do proper research before committing and lazy will waste money regardless cause he/she doesn't even understand what is paid for.