Well you might want to get a i5-3550 instead, not sure if it's way too expensive in Peru compared to the 2500.
You don't need so many watts on the power supply. 550 watts should be good if you're not adding anything else not listed.
Why do you need to cut costs the stuff you provided equals $920 (Not including the monitor as you did not tell us how much it costs)... The motherboard would be under $250 so that would equal $1170 at the most, which is in your budget.
I'm sure the monitor will not raise your costs over budget.
Do you not need Windows 7?
Oh ya mobo suggestion: Asus or Gigabyte H77 motherboard. mATX if you do not need the extra pci express etc.
The screen price is $205, which would rise the price to 1370, not counting i need to buy the voltage stabilizer and the hdmi cables, i can buy a gigabyte gaz68xpud4 for 250, but im looking for a less pricy board, any other board suggestion?