As ya said Fawful, Abrams would do very well(look at what he did for Trek), but also would be very predictable. And I think he's pretty much taken himself off the table. I guess muckin about with one enormous sci-fi universe is enough for him.
And Whedon would be good, but he'll also be way too busy to take on Star Wars. As much as I love Whedon and would love to see how he'd reinvigorate Star Wars, I'd rather see The Avengers 2.
"Geez, we've been back together for five minutes Doc, and you're already talking about the end of the universe."
"Stupid, stupid rat creatures!"