lol how did this get skipped? anyways, how do you plan on going with DDR4 then?

stick to your current RAM, get a 4690k and as for mobo, you can get that, MSI z97 kraken or a pc mate for cheaper.
with that said, might not be a bad idea to wait for skylake since you are waiting for the witcher 3 anyways. but thats not till summer. also, 4 years means your PSU might need an upgrade. what is your current make and model?