Building an Ubuntu Desktop for school

Hello to tom's hardware members,

I want to build my own Ubuntu Desktop ... I have never build
a desktop before. So I would like to ask for the input about the
hardware that will work well together. I don't know much about
desktop building, I am open to everything.

This computer will be purely for school only, I want to do programming
this computer, ideally if can work well with GUI development with
Gtk / Qt would be really nice. What kind of processors should I pick?

I don't know really need fancy graphics because I won't be playing
games on this machine. I have a budget of $700, what kind of
hardware do you think I need? I will be running 2 22" LCD,
I have a mouse and a keyboard. I have read a lot of builds for
gaming, but not so much for Ubuntu I think.

The OS I will be only using Ubuntu, what kind of hardware do you
think will be suited for my usage? Purely school work. I want to
have a reliable and relative quiet computer if possible.

I have a case picked out, Rosewill Blackbone Black Steel
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Thank you very much,
George