I like Booker...but you forgot about the fact that James Young needs to get minutes, and he gets then mostly at the SG position.
We can't just give up on Young at this early time, that would be really short sighted, and self defeating. He needs to play.
I say go big with 16, a PF or a C.
(If we can get a established top SG by Free agency, like Butler, that would be different.)