I am going to be building a new computer soon and am having trouble deciding between 2 cpus. I was originally planning to go with the 4690K but then I started looking into the skylake 6600k and it got me interested in it. I know I will need a different motherboard and ddr4 memory, which leads me to my question. Should I just build a 4690K system with ddr3 memory, or should I save just a little bit more and go for the newest skylake processor and ddr4 memory? Will I really benefit from the newer cpu, or will the 4690K deliver similar performance? In terms of price to performance and "future-proofing" (although that doesn't really exist), is skylake the better option for the extra cost?