Look at things this way. How many starting SGs would you rather have for the next 4 plus years when looking around the league.
Wade, Johnson, and Kobe most likely will have fallen off a cliff by then if they haven't started to already.
These guys I would most likely take over Bradley:
DeRozan 24 yrs old
K Thompson 23
Harden 24
E Gordon 24 (if healthy)
Beal 20 ( I really like him)
Then it's a whole bunch of guys that are debateable if you want to have for the next 4 plus years over Bradley IMO because of age and/or play.
JR Smith 28
Redick 29
McLemore 20
Waiters 22
Caldwell Pope 20
Stephenson 23
Mayo 26
Ellis 28
G Henderson 26
Afflalo 28
Maybe Oladipo 21- if he stays at SG
K Martin 30
Matthews 27
A Burks 22
The look at this upcoming draft. The high end talent seems to be at SF and PG not SG unless if Exum, Smart, Parker, or Wiggins can start off their career at the 2.
So Bradley seems to be in the same tier with a bunch of guys IMO, and not many clear cut better to have for the next 4 plus years. I say we end up with him because we might not find a clear better alternative.