Crib Bedding Sets Necessary??

So I'm pre-planning decorating the nursery and trying to decide on a crib bedding set so I can plan how else to decorate the room. After looking and looking, I'm not seeing anything I'm crazy about and for the price! 
I'm thinking most of the items in the set, I wouldn't even use. Sure, they make a picture look great but I just wouldn't use the little quilt/blanket, the diaper bag storage thing, the crib bumpers, crib mobile. So pretty much just the sheets and sometimes they come with a couple of wall decorations. So why buy the bedding sets?? Your thoughts???
Would you just buy a color scheme of sheets and wall decoration?

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