We're buying a second crib, but only because we're keeping DD in her crib for as long as possible. We bought a gender neutral crib that would fit a boy just, and we're planning on buying the same one for this baby, boy or girl.
I wouldn't buy a new crib if I had a perfectly safe, usable one already, girly or not. Babies don't know what they're sleeping in. If you really can't handle it, though, I'd suggest selling it then buying a new one. Or if you have the money to just buy a new one, go for it. It's your money and your choice.