there was a nice IPC bump and clock speeds bump from 2nd gen to 4th and buying into a platform where you can get the I7 4790K later if you need it just seems like a better deal then being stuck on an I7 2600K as your top chip. im pretty sure you would see the I5 4690K win in most cases tbh
thats a decent option, should beat this by a nice amount but first get the GPU. and dont just lock yourself in to that idea either, because once the B and H series boards for 8th gen Intel drop, that platform will make a lot more sense
