Subject: Re: Paris Hotel near CNIT La Défense?
Georgia,

My company's office also is in La Defense. When I travelled to Paris for work, I always stayed in the city center and took the Metro or RER to the office. So I cannot vouch personally for these hotels, but check out the following:

Hotel Mercure - http://tinyurl.com/27e6b Hotel Princesse Isabelle - http://www.hotel-paris-princesse.com/gb/

Both of them seem to fit your criteria of being under 150 euros and a short walk to the office buildings.

Have a great trip!

Mark Los Angeles