Nico Rosberg says he is ready to take on the challenge of going up against Lewis Hamilton at McLaren, after emerging as clear favourite to take the second seat at the team if it drops Heikki Kovalainen.
The 24-year-old, who was Hamilton's team-mate in karting, had been linked to a switch from Williams to BMW until the German manufacturer announced it was quitting the sport.
"I have been team-mate with Lewis before so that wouldn't be a problem," he said. "It would be fun and very tough also, a combination - sweet and sour.
"I would like a good team-mate for sure," he added, explaining that the identity of his partner is a factor in his decision, as he weighs up his options for 2010. "Team-mate is a factor. Potential for development for the future, who the key people in the team are and the management and everything. All these things come into it.
"Budget, salary they are able to pay. I am prepared to put salary last, that's nowhere near the priority as I really would like to have some good results now."
Rosberg admitted that Williams, the team he has raced for since entering F1 in 2006, is also keen to retain his services.
He added that he was happy with the options he had for next year, but was keen to shore up his future as quickly as possible.
"I'm sure they are very keen to keep me on board," said Rosberg. "I've done a good job for them and fit in very well with the team and everything so they are pushing to keep me on board for sure.
"I am still very pleased with my situation," he added. "I have various good options and at the moment I am still figuring out what the best way to go is.
"I am close to having a clear picture now of what the options are, I'm still gathering a few bits and pieces.
"I had a discussion with Williams last week to clarify what the situation is. I think sooner or later I'll be able to progress in a specific direction."
Rosberg said his goal now was to move up the grid with which ever team he chose to race for next year.
"It's the next step," he said. "I want to go further up. I've been finishing fourth and fifth and I want to be finishing first and second and third, which is the next step.
"It's a very important step and I need to judge where I am going to get the highest chance of getting that."