which is better gem for solr cloud setup in rails 4.1 application for aws hosting,I had researched some gems as below

Question

which is better gem for solr cloud setup in rails 4.1 application for aws hosting,I have done research on the below gems .

  gem 'rsolr-cloud',
  gem 'rsolr',
  gem 'sunspot_solr'

which is the best setup for solr cloud setup in aws hosting using elastic beanstalk.Please give me any suggestions with some documents or examples.

Thanks in advance.