Voted Sutil. I don't think he'd be that much expensive and he's doing a very good job atm at Force India.
Raïkkonen would be good for PR but I guess he'd ask too much money. And I'm not sure if he'd bring so many points. Not sure if he's motivated enough for a come back, and it wouldn't be such an easy thing to do with the new ruleset. I'm sure he's having enough fun in WRC, in a less competitive environment(as there are like 10 WRC cars per rally nowadays...), without having so much pressure for results.
Petrov. Well, he's bringing a lot of money, so I guess it wouldn't be an easy decision for Boulier to fire him. But well, Kubica scored like 6-7 times more points than him IIRC. Afterall Renault could have aimed easily for the 4th place at the champ, in front of Mercedes, if they had a proper 2nd driver...
Heidfeld, it's asking for trouble since he doesn't have good relations with Kub since they were teaming-up at BMW. His experience with the Pirelli would be interresting to have though.
Glock, Kovalainen, why not. Could have been nice picks but I prefer Sutil
I'd love to see how Grosjean would do also, everyone thought it'd be all over for him after being fired by Renault back in late 2009, but he's done such a fabulous season this year. He's been straight away in the pace after jumping in many cockpits, in GT1, GP2 and AutoGP. Since he now has a deal with Gravity, maybe there's a (very small) chance we can see him again at the pinacle soon?