I'd really rather draft a big instead drafting Austin.
As talented as Austin is, I believe we can have Ray back for a discount. And even if we don't, there are a plethora of FA 2's we could sign that could do what Ray Allen does for this team. And could be for cheap.
Brandon Rush (my Ray Allen replacement)
Alonzo Gee (not a shooter but a solid option)
Rudy Fernandez
Courtney Lee
Heck I'd go and say add Nick Young.
Solid big men would be a dime a dozen in this FA class. So for me, maybe we should address that problem on the draft. Be it Fab Melo, Arnett Moultrie, Tyler Zeller or Festus Ezeli. (and if they leave early, Jordan Henriquez and Aziz N'diaye. Add Jeff Whitey as a 2nd round target)