Yes, the 7970 is AMD's best single GPU card. Faster than the GTX680 and still $100 cheaper. Nvidia tends to have a little better driver support but that will change with the next gen consoles since both will be AMD-based. So basically all games will be built on AMD hardware for the next 6 or 7 years at least.
Core i7 5820K hexa-core @ 4.4 GHz | 16 GBs 2400 MHz DDR4 | Dual MSI GTX 970s | Dual 128 GB SSDs