Need is an interesting word. The real question is: Do you want to get a new blade? If yes, and you can afford it, go for it.
But you definitely don't need one. But, hey, I have at least 15 blades. If it is not an issue of money, get something you like. The best way to find out what you want is to ask people to let you try their rackets. The one you try and like the best, that may be the one to get.