binary data in `bytea' column

Hello.

It's nesessary for me to store bianary data (images, sounds, texts as
bytes) in the database. What should I use for better scalability,
generic `PreparedStatement.setBinaryStream' and
`SesultSet.getBinaryStream' or Large Objects?

I use Postgres 7.4, and autocommit=on is hardcoded in it. But I've
listened, that Large Objects may only work in a single transaction. So,
if I should use Large Objects (if so), how should I use them?

Anton