There really is no downside to putting off getting a GPU later. This way, you can get the best CPU and motherboard combo (because in computing, you really do get what you pay for), and an ok integrated GPU for now until you get some extra cash to get a better card in the future
edit: while it's not as good as a dedicated GPU, it will allow you to play games at medium settings until you get a better card
edit: while it's not as good as a dedicated GPU, it will allow you to play games at medium settings until you get a better card