Built a new PC, having trouble with choosing GPU

[Supaplex]

Hi, about 20 days ago ive build a new PC here on forum with you help guys, now its time to finally get the components, but some new versions of graphics cards arrived, and iam really confused about them, so here's the info:

CPU: i5-4670K
CPU Cooler: ARCTIC Freezer Xtreme Rev.2
Motherboard: MSI Z87-GD65 GAMING
Memory: Corsair 16GB KIT DDR3 1600MHz CL9 Black Vengeance
Storage SSD: Samsung SSD840 120GB 7mm, Basic
Video Card: EVGA GeForce GTX780 Superclocked ACX

Now here's the problem, new GTX780 cards arrived, and i need help choosing between:

EVGA GeForce GTX780 Superclocked ACX ( 647,50 EUR on Alza.sk )
3GB DDR5 (6008MHz), NVIDIA GeForce GTX780 (967MHz), Boost clock 1020MHz, PCIe x16, SLi, 384bit, DisplayPort, 2xDVI, HDMI

MSI N780 TF 3GD5/OC Gaming ( 626,03 EUR on Alza.sk )
3GB DDR5 (6008MHz), NVIDIA GeForce GTX780 (954MHz), Boost clock 1006MHz, PCIe x16, SLi, 384bit, DisplayPort, 2xDVI, HDMI

GIGABYTE N780OC-3GD ( 617,40 EUR on Alza.sk )
3GB DDR5 (6008MHz), NVIDIA GeForce GTX780 (954MHz), Boost clock 1006MHz, PCIe x16, SLi, 384bit, DisplayPort, 2xDVI, HDMI

GAINWARD GTX780 3GB DDR5 Phantom GLH ( 648,55 EUR on Alza.sk )
3GB DDR5 (6200MHz), NVIDIA GeForce GTX780 (980MHz), Boost clock 1033MHz, PCIe x16, SLi, 384bit, DisplayPort, 2xDVI, HDMI
- This one seems to be the strongest.

EVGA GeForce GTX780 Superclocked ( 633,78 on Alza.sk - out of stock tho )
3GB DDR5 (6008MHz), NVIDIA GeForce GTX780 (941MHz), Boost clock 993MHz, PCIe x16, SLi, 384bit, DisplayPort, 2xDVI, HDMI


--- Differences seem to be extremely minor, and well i believe you see the problem here about my confusion.

Main use for the PC is next-gen gaming, for next 3 years AT LEAST. Budget was 1000euro, but it kinda went up to 1300+/- Which is the most far acceptable price.

 

[Supaplex]

No help or recommendations ? :/

 

[lkkgg72200812]

Either EVGA 780 ACX or GIGABYTE 780OC are recommended model. MSI N780 Gaming looks like a cost-down version from Lightning, which its performance is lower.