At this point and time, I can tell you it's a terrible time to buy a new GPU card. Terrible time. The prices are very inflated right now due to the data mining fad saturating the market. They are buying all the new cards by the tens of thousands and inflating costs. If I were you, I'd go with a used or refurbrished card right now, and wait for prices to drop. Just be careful if you buy a used card. Find out what it was used for. Because if it was used for data mining, then chances are it's been run at 100 percent it's entire life, and will probably not live much longer.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.