What should I get next – MCSE or MCITP?

I signed up for PrepLogic.com’s unlimited program (you get to use all of the training they have for any exam you want), and I need help deciding what to get next. I’ve already used it to get my Network+ 2009 certification, and then I passed SQL Server 2005 (70-431). I’m trying to decide which way to go from here: MCSE or MCITP? What are the pros/cons of each?