>>I'm considering to take the 029 so I have another exam for the MSCDBA track also. (I presume the 155 will become an elective for this)

029 is my choice. From the description, it sounds like most of it should be pretty familiar, and it will spur me on to finally take a good look at SQLSvr/MSDE. I figure a day to read some docs, and get in there and build a few test projects should get me most of the way there.