For the technical information you are looking for, I would suggest that you contact and F5 Sales Representative. A Sales Rep should have all of the technical information that you are looking for as well as a higher level overview of available Modules and how they can be tailored to meet your business needs.
As far as the performance and scalability of the F5’s. The F5’s are highly configurable, so you get out of them what you put into them. Hence DevCentral, an entire support community of fellow users helping each other that is supported by F5. Which in my opinion, speaks for itself considering the number of people that get questions answered here or learn new ways of toing things, rather than having to actually open up a support case.
But, this is just my opinion.