Which Graphics Card for sub 1000$ builds

 Hi guys, I am currently looking around and trying to design a build for FSX. So for I am considering the GTX 970 MSI Twin Frozer, but do I need that much for FSX? I want to get smooth FPS, so not neccesarily 30 FPS, and will be 1080P. Addons I am going to be running are PMDG 737, 777, and 747. I also do have scenary for Seattle and other locations, and do have an external weather engine, which I plan to upgrade later. DX10 does look awesome with the cockpit shadows, and so I might possibly get Steve's DX10 fixer, although I can forgo this if it isn't worth it. In terms of cost, it is not set in stone, I just would generally like to keep the whole build less than 1000 if possible but I can go over if needed. I also do play other games including Cities Skylines, Euro Truck sim 2, and modded minecraft.

Thanks!