I would for Lee and the Celtics own 1st.
Since leaving Toronto, Gay's become a much more efficient player. He's a legit 20-point scorer every night, rebounds well for his position, and is also a decent passer. His contact isn't onerous either.
If he were a little more proficient at shooting the three, he'd be exactly the wing scorer the Celtics need. Even without that part of the game, he'd be a very good addition, I think.