When are you planning to go live? If it is June or later then I would recommend using SQL2016 SSRS. You have to look very closely to see any differences between SQL2008R2, SQL2012 and SQL2014 SSRS, but there are a lot of new things in SQL2016 SSRS that you are likely to find useful.
You can start your evaluation and development using a SQL2016 CTP, and hold off going live until SQL2016 RTM, rumoured to be in May.
Original author: https://github.com/SQL-FineBuild/Common/wiki/ 1-click install and best practice configuration of SQL Server 2019, 2017 2016, 2014, 2012, 2008 R2, 2008 and 2005.
When I give food to the poor they call me a saint. When I ask why they are poor they call me a communist - Archbishop Hélder Câmara