The 280X is about 15-20% more powerful than either the 380 or 960. If you can get that card for roughly the same price as the others, then it is by far the better deal. It will also be a good card if you ever decide to upgrade to 1080p. The only caveat here is that with the 280X you will not have much headroom to OC it with your power supply (but even with just the factory OC the 280X is still faster than manually OC'd 380s and 960s).