check the related questions in the right side : One of the question that might be helpful : - pm.stackexchange.com/questions/4088/…

This link can be helpful pm.stackexchange.com/questions/10119/…

@Roop, like others said , "each" story need not be short enough.It will be worked by multiple team members but tasks within the story should be kept 0.5 days to 2 days

@JeffLindsey , you are right ...we can start with Model2 and after discussion with team and client , if required , we can have Model1...Right now,we have to suggest some Model in proposal stage only but as you suggested , we will add this point and we will keep this option open

@JeffLindsey, we are in proposal phase so dev team is to be formed yet

@NathanCooper, updated the cons of Model1

@Zsolt, added your link in Model2 ...its not a comparison. But its a very good post that tells about Model2. It will definitely help.