Brewer slugger Carlos Lee, who is one of the marquee free agents-to-be this winter, said yesterday that remaining in Milwaukee is currently his No. 1 choice. But when asked whether he could see the Mets being a team he'd be interested in playing for, Lee indicated it was not impossible. "You can't rule out anything," Lee said. "You have to go out there, and whoever needs you and whoever wants you, that's a part of the business."