For at least until 2016, you should be good with a GTX 680 SLI setup. However, many new releases are poorly optimized, and a lot of them have issues when you run a SLI setup. With 1080p, you SHOULD be fine, but if I were you, I'd just buy a single very good GPU such as a GTX 980 or perhaps a GTX 970 if you're not willing to spend TOO much. But this is if you haven't bought the 2 680 GPUs yet. If you have, you should be good, for like a year or 2