It's a no-brainer get the 4770K if you afford it because it's 2 generations newer than the fx 8320 , consumes less , generates less heat - thus last longer , performs not sooo much , but BETTER . The motherboards with sk1150 are 2 generations newer too , so you get more usb 3.0 , potentially more pci-e lanes , less motherboard power consumption , also higher ram speeds+XMP.
So with 1400 euros you have no reason to buy amd cpu....
with 1400 i would :
Corsair Carbide Series 500R Arctic White Steel / Plastic ATX Mid Tower
ENERMAX REVOLUTION X't ERX730AWT 730W ATX12V 80 PLUS GOLD
MSI Z87-G45 Gaming LGA 1150 Intel Z87
Intel Core i7-4770K Haswell Quad-Core 3.5GHz LGA 1150 84W Desktop Processor
G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900)
GIGABYTE GV-N770OC-4GD GeForce GTX 770 4GB 256-Bit GDDR5
SAMSUNG 840 Pro Series MZ-7PD256BW 2.5" 256GB SATA III MLC
Seagate Barracuda STBD2000101 2TB 7200 RPM SATA 6.0Gb/s 3.5"