You can try the CiviCRM Starter Kit on Pantheon for FREE.
This site is built on the CiviCRM Starter Kit which is maintained by Herb v/d Dool. This Starterkit is not officially affiliated with CiviCRM.
The demos and design of this site were originally created by John Derry. The much of the configuration has been captured using the Features CiviCRM module developed and maintained by Tim Mallezie. The Demo uses the Twitter Bootstrap Theme with loads of contributed code from the CiviCRM and Drupal communities.
Hosting for this site is provided by Pantheon.