Imagine you want to implement a web-based content management system yourself...
Requirements are multiuser capabilities (>1000), Great performance, a forum/board has to be included, I want to be free to design all functionality and specific stuff like authorization. Gathering data over APIs from other webservices should be easy to implement, Easy to host and comfortable to program.
... what web technology would you prefer? and why?
Is php and java a suitable combination? Would you prefer it?
(And yes that question is subjective, if that forum doesn't fit can you recommend another place to ask experienced people? I was already directed to pro webmasters from another stack-site)