Which drivers generate the best results seems to vary from card to card and set-up to set-up, taking into account things like Crossfire vs. a single card and the like. There usually isn't a "magic bullet" driver. Personally, I have good performance with the official 12.1 release drivers on my 6970. Some other people have had better luck with the 12.2
preview set. I haven't tried those myself...I prefer to stick to official releases.
I'd recommend trying either of those. Neither has had many reported problems with Skyrim, especially on a single card set-up like your sig says you have.
Stay far, far away from the 12.2 pre-certified / pre-WHQL and 12.3 release candidates until further notice. Those drivers seem to be a genuine mess and are causing BSODs for 7xxx-series owners and major artifacting issues in Skyrim (and other games, like SWTOR). They're pre-certified though, so hopefully Microsoft has the good sense to keep them from escaping into the general population in their current state.
TL;DR: Try 12.1 or 12.2 preview if you don't have them already. Avoid 12.2 pre-certs and 12.3 RCs like the plague.
EDIT: I should add--I never really had a performance problem with Skyrim to begin with. But the biggest performance increases I've seen have been through Bethesda's patches (1.3 and 1.4, to be precise), not through driver updates.
