Here are two screens of the export settings I most commonly use, first is a ProRes master of the project and the second is my most common online delivery profile. As you can see in the output preview monitor the blacks are not as deep as in the program monitor on the right.
However, when bringing the file back into premiere as you had suggested the black levels are correct. Still my main concern is final delivery and how it will look in the setting it lives in (usually vimeo, youtube or a player like brightcove).

