Implement JOOMLA Newsletter System

We are new to Joomla, we need someone to implement a Newsletter system in Joomla very quickly. THe System must be very easy to maintain and must be able to: Front End 1) Newsletters must be Editable from the front-end or Back-end. (A NL Template in HTML is already existing and will be provided) 2) Published Newsletters must be viewable through the front-end. (Layout is also existing in HTML and will be provided.) 3) "Subscribe" and "Unsubscribe" must be reachable from the newsletter and also from the front-end 4) Login -> Should be possible from the front-end to reach the administration backend Backend / Administration 1) Import Lists via .CSV (1 Example List will be provided) 2) Save Templates 3) Statistics (Viewed, open, sent) 4) Save Messages / Copy, Edit. 5) Manage Listings POSSIBILITIES: We already have RSMAIL for Joomla installed on a server, we like this system, If you want to use this one feel free. We are open for alternatives. Developing Server: LINUX, under [login to view URL] Access will be provided for FTP and Admin Super User for Joomla.