Search Path vs Synonyms

Given the situation where a user connecting to the database needs access to two separate schemas: the primary schema which contains the data they will be updating and a second schema which contains read-only reference data, used by many users, that will be using in joins on queries.

I don't want to have to use fully qualified names (I am migrating code from Oracle which uses synonyms), so what is the best way (in both performance and reliability) to refer to the tables; Search Path or Synonyms?

Thanks.

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