Well if it were me and I was going to be looking at new tools for BI I'd look at Sisence, IBMs Cognos Analytics, Tableau, Looker, Domo or even Microsoft's Power BI. I would not have normally included Tableau but they seem to be making a come back and investing in what users…
I would go with Pentaho. BOARD is not around enough companies to hear about how good or bad it is (most big companies with a lot of users like that do not use it). Birst has some issues but has some success with smaller user bases.