All filmic material has pulldown added so it can be shown on NTSC TV at 29.97. 24p video cameras add that pulldown in the camera.
So if you’re delivering to DV (29.97), import the footage at 29.97 (don’t remove pulldown), and work in a 29.97 comp. You only want to remove pulldown if you’re doing some work that requires it, say, rotoscoping, or if you want to work on Varicam matrial at 23.98 for example, or go back to film.
People are used to seeing filmic material on TV at 29.97 with pulldown, so it’s cool to leave the footage at 29.97. It looks just as filmic (temporally) as film playing on TV.
As for the motion graphics, you could try rendering to the animation codec at 23.98, then re-importing and rendering to DV at 29.97 with pulldown added so the looks match. That should give you the look you want. Do a test.
At any rate, if you’re delivering DV, your final frame rate has to be 29.97 for NTSC, whether the footage is 24 pulled-down, or native 29.97.
Does that help?
Steve