The New Office

Well Happy Saturday everyone!  I have to get myself going.  Did not sleep well last night.  Too excited about making an office in our spare room.  It would be my "Lady Cave".  I have a beautiful cherry desk that I am working with now.  I would like to purchase two tall bookcases to flank the sides of it.  This is my big question.  I can't decide if my color for those should be black or white.  The color of the room is kind of yellowish/gold.  I would like to put in a chair and another long table for crafting, sewing etc.  I have an old buffet that I could use that for, and I would like to paint it as well.  OK, this is the question.  What color should those extra pieces ( shelves and buffet ) be, black or white?  Do I want to black and sophisticated or white and girlie?  Any sugestions ladies?  I could really use your help.

Thanks,
Susan