It took me about 8 months for all three parts. (I could have done it even more earlier, its just human nature to delay things).
It took me about 2 months to study for part 1. I then took my time to do part 2/3. I'm quite sure part 2/3 can be done in about 2 months if you're just disciplined to go through everything.
For part 1, I recommend Sun Certified Enterprise Architect for
J2EE : study guide (exam 310-051) / Paul Allen, Joseph Bambara.
For part 2, I recommend Sun Certified Enterprise Architect for J2EE technology : study guide / Mark Cade, Simon Roberts.
Actual
-----<br />SCJP, SCWCD, SCMAD, SCEA, CAPM