Hi BenR08. It's nice that you are looking for a fragrance for your girlfriend and that you are thinking about Tuberose because you like it. BUT a word of caution. Not everyone does like Tuberose. Are you sure that she will? If you do think that she likes Tuberose notes then you have some great suggestions here, but Carnal Flower is over your budget. I agree with furrypine, Fracas is not an approriate blind buy for someone. Neither is Tubereuse Criminelle.
Truth or Dare might be good, or La Chase Aux Papillons and they are certainly on budget, but maybe you should drop some hints or get some clues before you spend a lot of money on an expensive fragrance that she doesn't like. Mind you, you could always wear it!!