Building a gaming Pc for 750$ USD (Updated)

Save money by getting an i5-6500. Then, you can spend the extra money on upgrading to a 1060 6GB.

A lot of those companies will not ship internationally. I know Amazon does. You need to stick with Amazon sold items. Not items sold by third party Amazon resellers. Newegg only ships to a few countries in Europe, Asia and Australia.

Also be prepared to face high shipping charges and import duties. I assume you are in a latin american country, as you use the Peso. Mexico may be easier and possibly duty free. I'm not clear how NAFTA works with retail purchases. Whether it goes with manufacturer origin or country of import origin. Other countries may be much more difficult or have very high duties. Check your local import laws. If it goes with origin of manufacture most parts will be made in China or Taiwan. If your country recognizes Taiwan's sovereignty.

Best to stick with a Z270 board. So you don't have to fiddle with trying to update the BIOS to get the 7600k to work. I don't know if that specific board you chose works with a CPU-less and RAM-less BIOS update. Why take the risk when the prices are so close?

Downfacing heatsinks don't work as well as tower types. Plus the giant downfacing models can block access to parts of the motherboard.

The Radeon Rx 480 4GB is generally considered a better deal than the GTX 1060 3GB. On average it benchmarks a little better. That extra 1GB of VRAM can make a big difference in VRAM hungry titles. Plus it costs a little less.

Anyways going Amazon only with equivalent parts and some corrections. You are looking at close to $850 USD based on your list. Changes made where for motherboard compatibility or better prices. Based on Amazon only prices.
https://pcpartpicker.com/list/2LTX3F

You can save some by using an i5-6600K as that opens back up the Z170 boards. Once overclocked there isn't much difference between a 7600K and 6600K. But it is only $20.
https://pcpartpicker.com/list/kG4KkT

Really before you can get a good list. You need to figure out your countries import duties, any other fees and shipping costs. As they may greatly increase the price. So if the above is the performance you want. You will need to save more money. If saving more is not an option. You will need to know those fees and figure out your actual limit. Perhaps a local seller may end up being cheaper.

Also keep in mind. If an item is faulty. The warranty will likely be null and void as the included warranty is usually country or region specific. If it has to be returned to Amazon due to fault within the return window. You will have to pay international shipping fees. Depending on your country you may not get back your import duties, have to pay export duties and pay import duties for the replacement. Or at least have to jump through bureaucratic hoops to get your money back. Unless you will actually save a lot of money or the items just are not available in your country. It is best to leave importing to the professionals.

You're welcome! Considering how much you are spending I would suggest getting a slightly better motherboard. As it will have better upgrade options for the future. Such as SLI and NVMe M.2 SSD. If you can possibly save the money get an 8GB Rx 480 or 6GB GTX 1060. The extra VRAM will make a big difference in your video cards useful life at high settings.
http://pcpartpicker.com/product/G9X2FT/msi-z270-sli-plus-atx-lga1151-motherboard-z270-sli-plus

Unlocked CPU. Generally a CPU has a much longer use life than a GPU. A good CPU will last for two or three video card replacements in a gaming PC. If you cut down on the CPU for a better GPU now. In the future you will be buying a new CPU and GPU at the same time. While it will be better in the short term. You are sacrificing the long term life.

I'm using an i5-3570K @4.2Ghz. I started with a GTX 560 Ti and replaced it with a GTX 970. As I'm not maxing out the CPU yet. I'll likely be able to keep it for one more video card generation. Plenty of people are still doing fine with an old i5-2500K and new GTX 1060/Rx 480.