If the company headhunting you want you, they should be the ones making the offer. Why would you divulge what you want? Your not asking them for a job, they want you to work for them so they should be making you an offer.
As in all negotiation, whatever their first offer is, reject it. No one makes their full and final offer first time around.
As others have said, don't be totally swayed by the salary figures. I used to work for a smaller independant company and the pay was way better than the industry average but as the company was essentially run by the owner, who was a fat ****er, all protocols of HR and normal conduct went out of the window. Sick pay was paid at discretion, holiday requests were granted or not at his discretion, bonus targets were constantly changed to stop you earning etc etc all stuff that a big company couldn't get away with.