Another consideration is which SAS/Access product to license.
If your organizational need is just for Oracle, then SAS/Access for Oracle is the best choice. If you need access to other DBMS products (M$'s SQL/Server, say), then SAS/Access for ODBC will also work.
SAS/Access to ODBC loses some performance optimization for Oracle, so you will need to consider the trade-offs.
(You didn't mention your Base SAS license OS. ODBC can be a pain to manage on Unix.).