Hi guys. I've had my Sapphire 5870 video card for 2-3 years now and I feel an upgrade is needed. My system specs: AMD Phenom II x6 1090t BE @ 3.8 Ghz, 8gb Corsair RAM, Corsair HX850 PSU. I'm wondering if an upgrade is needed really soon or should I wait a bit for new cards to come out or for current cards to get cheaper? I've been looking into the Radeon 7970 and Nvidia GTX 670 and 680 and I'm really impressed with all three. If I were to upgrade my video card; should I buy one of these three or another?