Should I upgrade my system for future games etc?

[Dodger6930]

well lads, so I have a gaming computer that I built just over 2 years ago and it has an i5 4460, r9 270x and 8gb of ram. Firstly I have always wanted to upgrade my graphics but I am clueless as what to get? I have, however, narrowed it down to either an Rx 480 or a gtx 1060. Now secondly, i have a gigabyte z97-dp3 mobo but I only have an i5 4460, should i upgrade to the 4690k? I know its an older generation, but would it still be a good choice? Thanks, Sam

 

[Aeacus]

About your CPU upgrade.
i5-4690K is the 2nd best CPU you can put on your MoBo. Best being the i7-4790K. Though, i5-4690K is the best value LGA1150 socket CPU, while i7-4790K is 2nd in value.
Also, since you have Z-series MoBo and you're planning to get K-series CPU, you can OC (overclock) your new CPU to get some more juice out of it if you like.

Few comparisons,
i5-4460 vs i5-4690K,
link: http://cpu.userbenchmark.com/Compare/Intel-Core-i5-4460-vs-Intel-Core-i5-4690K/2310vs2432
i5-4460 vs i7-4790K,
link: http://cpu.userbenchmark.com/Compare/Intel-Core-i5-4460-vs-Intel-Core-i7-4790K/2310vs2384
i5-4690K vs i7-4790K,
link: http://cpu.userbenchmark.com/Compare/Intel-Core-i5-4690K-vs-Intel-Core-i7-4790K/2432vs2384

For gaming, i5-4690K will do just fine. If you want to have the best CPU that your MoBo supports and have the money for i7 CPU, you can go with i7-4790K. Though, i7 CPUs are mostly for workstation builds (e.g video rendering) but you can also game on them just fine.

According to the today's standards, the CPU performance between Intel's 6th gen and 4th gen CPUs would be:
performance - Sylake - Haswell
low-end - i3-6100 - i5-4460
medium-end - i5-6500 - i5-4590
high-end - i5-6600K - i5-4690K
workstation - i7-6700K - i7-4790K

And now about GPU upgrade.
First off, here's GPU hierarchy table,
link: http://www.tomshardware.com/reviews/gpu-hierarchy,4388.html

And few comparisons as well,
R9 270x vs RX 480,
link: http://gpu.userbenchmark.com/Compare/AMD-R9-270X-vs-AMD-RX-480/2188vs3634
R9 270x vs GTX 1060 3GB,
link: http://gpu.userbenchmark.com/Compare/AMD-R9-270X-vs-Nvidia-GTX-1060-3GB/2188vs3646
R9 270x vs GTX 1060 6GB,
link: http://gpu.userbenchmark.com/Compare/AMD-R9-270X-vs-Nvidia-GTX-1060-6GB/2188vs3639
RX 480 vs GTX 1060 6GB,
link: http://gpu.userbenchmark.com/Compare/AMD-RX-480-vs-Nvidia-GTX-1060-6GB/3634vs3639

GTX 1060 3GB is the best value GPU there is. Even though the 6GB version has double the VRAM than 3GB version, the performance gain is about 6% while the price goes up by 15%.
comparison: http://gpu.userbenchmark.com/Compare/Nvidia-GTX-1060-3GB-vs-Nvidia-GTX-1060-6GB/3646vs3639

GTX 1060 can run today's games @ 1080p with high/ultra settings with solid 60 FPS or more. If you have the money, go with 6GB version. Else-ways, go with the 3GB version.
(When i was building my Skylake, specs in my signature, i went with GTX 1060 3GB GPU. 6GB version did cost me 80 euros more than 3GB GPU and to me, the gain in performance was too small to justify the huge difference in cost.)
Here's some further reading: www.tomshardware.com/reviews/best-gpus,4380.html