Here is my shortlist when I was deciding about hotel n Paris last year.
http://www.tripadvisor.com/Hotel_Review ... rance.html
http://www.tripadvisor.com/Hotel_Review ... rance.html
http://www.tripadvisor.com/Hotel_Review ... rance.html
http://www.tripadvisor.com/Hotel_Review ... rance.html
http://www.tripadvisor.com/Hotel_Review ... rance.html
http://www.tripadvisor.com/Hotel_Review ... rance.html
http://www.tripadvisor.com/Hotel_Review ... rance.html
http://www.tripadvisor.com/Hotel_Review ... rance.html
http://www.tripadvisor.com/Hotel_Review ... rance.html
http://www.tripadvisor.com/Hotel_Review ... rance.html
http://www.tripadvisor.com/Hotel_Review ... rance.html
And you don't need to be in the very center. You can be a bit further and near a metro station. Check these links also:
http://www.ratp.fr/
http://www.transport-idf.com/frontal?co ... &langue=en
http://www.parismuseumpass.com/en/home.php