I found this photo online, perhaps it will help. In this picture the crown molding on the cabinets flow from the kitchen to the adjoining room. Maintaining continuity with the color and some of the trim detail will make the rooms transition nicely. Don't overlook the details like hardware finish, lighting and plumbing fixtures as these elements can also tie the two styles together. I hope this was helpful.

Nobody's asking, but I wonder what a wood garage door would look like, something to bring out the bit of brick at bottom....I liked our split level.

It sounds lovely. The ceiling will be more than suitable for a transitional style. I think the wainscoting would also be fine but as I'm cautious I'd be adding after I'd lived there for a while. It does seem more traditional than transitional. On the other side I'd love the bead boarding in the hall.

Oh wow, it looks fantastic! The black looks so striking against the white, not too sharp at all. Congratulations on the house, you must be very excited to move in. :)