PCPartPicker part list:
https://it.pcpartpicker.com/list/42gRhq
Price breakdown by merchant: https://it.pcpartpicker.com/list/42gRhq/by_merchant/
CPU: Intel Core i5-7600 3.5GHz Quad-Core Processor (€229.35 @ Amazon Italia)
CPU Cooler: Cooler Master Hyper 212X 82.9 CFM CPU Cooler (€40.55 @ Amazon Italia)
Motherboard: Asus STRIX H270F GAMING ATX LGA1151 Motherboard (€124.86 @ Amazon Italia)
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-2400 Memory (€127.61 @ Amazon Italia)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (€51.00 @ Amazon Italia)
Video Card: EVGA GeForce GTX 1070 8GB SC Gaming ACX 3.0 Video Card (€446.85 @ Amazon Italia)
Case: NZXT S340 Elite (Black) ATX Mid Tower Case (€101.99 @ Amazon Italia)
Power Supply: SeaSonic 520W 80+ Bronze Certified Fully-Modular ATX Power Supply (€88.55 @ Amazon Italia)
Monitor: Asus VG248QE 24.0" 1920x1080 144Hz Monitor (€263.86 @ Amazon Italia)
Total: €1474.62
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-06 15:45 CEST+0200
And when you can find the additional money, I would throw in an SSD as a boot drive.
Something like this: Crucial MX300 275GB 2.5" Solid State Drive (€89.99 @ Amazon Italia)
or this Crucial MX300 275GB M.2-2280 Solid State Drive (€94.91 @ Amazon Italia)
Just know the motherboard M.2 slot #0 shares bandwidth with a SATA 6.0 Gb/s port. When the M.2 slot is populated, one SATA 6Gb/s port is disabled. That should not be a big deal in this case.