Annnnnd I disagree about the weight issue. Your favorite clothes can help keep you in check, make sure you're not going off the deep end in terms of your health. I've got about 7 pairs of the same pair of jeans (the cut, at least) in the same size in my closet. If I ever gain weight...welll...that's a lot of money down the drain.
I'd buy more than one, if you like it that much. Tastes may change, but some things remain constant. I could never fully give up my jeans and t-shirts, for example.