Have you gone to the resources tab at the top of this page and read the "Saxophone Buyers Guide"?  It is a pretty comprehensive discussion of buying options including modern and vintage pro horns.
I assume you already know what school you are headed to.  If so, i would also pose this question to the saxophone profs at your new school.  Some schools can be pretty fixed-minded (euphemism for close-minded) about what horns they want their students to be using.  You need to know if this is the case ahead of time.

Good luck with your search.  It should be a lot of fun!