Okay back to the post... what is the nature of your business... meaning what do you do that you need to have a GPU over onboard? If you truly don't require a GPU, believe it or not, I recommend going with a Dell Vostro system... http://www.dell.com/us/en/business/desktops/desktop-vos... . This is what I use at my work and it performances great for office work... now if you are doing "Graphics" than jbakerlent's comments should be taken into account.
Whoops, just clicked the links, didn't read about it being used for office work... doh. Yes, in that case, a number of changes could be made. After you edit to use the sticky it will be easier to help you.