I'm under the impression the SCEA 4 isn't offered anymore meaning you would have to take the SCEA 5. I blogged about the SCEA 5 resources.
The Cade & Sheil study guide was very useful for SCEA 5. Note the SCEA 4 study guide will not be very useful as the content covered on the exam is different. In particular, SCEA 5 is more current and somewhat higher level.