This is a great little office build with an intel i3-2100.
If you want more storage space, I could cut corners on the CPU to get more storage.
You could add another 4GB stick of RAM if you wanted in the future to get 8GB.
There is space for a graphics card and there are 3 more expansion slots for any cards you might want to add. http://pcpartpicker.com/p/iCNN