Rosie,
If you really want the bracelet, get it. Everyone has slightly different reasons for getting a bracelet, ring, bag, jacket etc. Also, seeing that despite the responses from others, you still want the bracelet, if you settle for something else, you will still crave the Tiffany's heart bracelet.
When you purchase jewelry from Tiffany's, Cartier, Van Cleef, you are always paying for the brand. However the brand does include workmanship in addition to reputation. Many of the reputable independent jewelers in the NYC area I know seem to charge about the same prices as Tiffany for comparable jewelry. I could just have very little knowledge in general, but jewelers I like tend to be in the same price range with Tiffany's.
I have one gold bracelet from Tiffany's and I wear it everyday. I don't feel the urge to buy other bracelets and it's very well made. I would recommend Tiffany's gold jewelry if you are willing to pay the price, but only you can decide that.
Finally, I would suggest you keep your charm bracelet as well. You never know when you might like to wear it again, and if you sell it, you will regret not having it handy. I never get rid of jewelry (I do let my mom borrow some of the pieces that I might not be wearing currently though :o)).
Good luck with your decision,
Diana
