Architecture Decorating™

I have one stand out piece that I can't bring myself to get rid of from IKEA ( i was slowly ridding myself of the ikea junk). I really like the lines of this bjursta sideboard that I use as my media center -but the knobs are really boring. I went to anthropology and as a tester bought 3 of these square glass pulls - do you like them? do they go? Any opinions would help! I'm thinking if i keep them I have to replace the lower 3 knobs as well ( anthropology only had 3 of these, ugh ). Sorry for the poor picture, it's not on their website!
UPDATE: I've decided to return these pulls -the search continues!