Hi everyone, I seriously need some perspective. I've ordered an Overlord Tempest X270 OC 1440p monitor. I'm trying to decide between: 1. 2x XFX R9 290X (CrossFire) 2. 2x nVidia GTX 970 (MSI/Asus Strix) (SLI) 3. Single nVidia GTX 980 PNY XLR8 Pro OC Other parts are: EVGA 850 G2 Intel Core i5 4690K Asus Maximus VII Hero GSkill Trident 16GB Intel 730 Series SSD (480 GB) NZXT S340 Have been reading up a lot but am finding it hard to choose. Any help is greatly appreciated.