The Antec will be quieter, less fans. If you add all the fans both are possible of using the 590 should be quieter since it is more sound dampening since it is made from thicker steel and is less "open".
Newegg had the antec sonata III for $45 shipped this morning with special email code. Look for similar deals this black friday. Sometimes you don't always get the latest model, but the savings are worth it.