All of the following graphics cards are based on NVIDIA GeForce GTX 1070 "Pascal" (PCIe gen3 x16.
I've complied a list for you of recommended GTX 1070 cards. All of them are VR-Ready and allow playable UHD/4K frame-rates in many modern AAA game titles.

8GB GDDR5, 2x fan cooling, 3x DP1.4, 1x HDMI2.0b, 1xDVI-D
* ✈ International Shipping available.
EVGA GeForce GTX 1070 GAMING (08G-P4-5170-KR): $349.99
8GB GDDR5, Custom Vapor Chamber cooling, 3x DP1.4, 1x HDMI2.0b, 1xDVI-D
* ✈ International Shipping available.
Gigabyte GeForce GTX 1070 G1 Gaming (GV-N1070G1 GAMING-8GD): $350.69
8GB GDDR5, 3x fan cooling, 3x DP1.4, 1x HDMI2.0b, 1xDVI-D
* ✈ International Shipping available.
EVGA GeForce GTX 1070 "Founders Edition" (08G-P4-6170-KR): $375.40
8GB GDDR5, Vapor Chamber cooling, 3x DP1.4, 1x HDMI2.0b, 1xDVI-D
* ✈ International Shipping available.
ZOTAC GeForce GTX 1070 "Founders Edition" (ZT-P10700A-10P): $379.99
8GB GDDR5, Vapor Chamber cooling, 3x DP1.4, 1x HDMI2.0b, 1xDVI-D
* ✈ International Shipping available.
MSI GeForce GTX 1070 "Founders Edition" : $399.99
8GB GDDR5, Vapor Chamber cooling, 3x DP1.4, 1x HDMI2.0b, 1xDVI-D
ASUS GeForce GTX 1070 8GB Turbo Edition (TURBO-GTX1070-8G): $367.57
8GB GDDR5, Custom Vapor Chamber cooling, 2x DP1.4, 2x HDMI2.0b, 1xDVI-D