I need to put together a computer that will be used for at least 5 years. No gaming, no graphic design, nothing fancy, just web browsing, email, word, and so on. I am working with a very limited budget so some sacrifices would need to be made in order to have a 64 bit processor. So my question is, would it be worth getting the a64 2800, or would a 2500 or even 2000 be enough?