The problem you will run into is your motherboard will likely only have a PCI-e 1.0/1.1 slot. Those video card you mentioned are PCI-e 3.0 cards. There may or may not be potential compatibility issues. For example, some old motherboards with PCI-e 1.0/1.1 slots have issues with PCI-e 2.1 cards. It's rare, but it has been reported.
So far there hasn't been any reported incompatibilities with PCI-e 3.0 cards, but they have only been recently released and I am assuming most people who have upgraded has a motherboard with a PCI-e 2.0 slot.
What you can do is buy the card 1st, then if you run into issues upgrade to Ivy Bridge.