I am building an office PC for a friend that works in a charity office and has zero budget. I've sourced on the MP (thanks Zoon) a Dell C2D machine which will be waaay better than the 10yr old Celeron beige box. I was going to give it (having raised a few £) a new hard drive. I have £35 to spend, and know that she is using less than the current 80GB drive can store. Any reason not to get a 120GB SSD? Otherwise it would be a 500GB HDD for the same money.