"It's a difficult decision, that's why it has taken so long," he said. "To be honest, I don't know when I am going to get it done, I just want to make the right one.
"This will be the hardest decision I will make in my footy career - this is going to take time."
Asked if Brisbane's stellar form heading into the finals may help keep him, Blair said: "I have said all along, I didn't want to leave, that I wanted to finish my career up here.
"Now Wayne [Bennett] has given me the opportunity to look around and I guess clubs are wanting me to go there."
Blair's previous experience as a big-name recruit at a rebuilding club has not put him off such a move. He moved from heavyweights Melbourne to the Tigers in 2012 and struggled for three seasons, before being snapped up by Brisbane.
"I am older and wiser now," Blair said. "I understand, when you go to a club as a big signing, there is pressure that goes with it.
"When you choose where you go, you look at the people you will have around you and hopefully there is enough around you that can take you to the top similar to the Broncos."