Honestly, at my last company we decided against adding a lot of this information. After measuring, it turned out that a simple, bare-bones landing page converted to signup best. After some investigation, it turned out that, for our business, the overwhelming majority of users showed up already knowing what they were about, rather than by searching "how do I x" or landing there via hacker news. What converted best was a site with our logo to confirm they were in the right place and a big, obvious way to sign up/in.
May I ask what type of product your company is offering? It's great that you have enough brand recognition to make the assumption that people know exactly what you're offering, but I feel that this isn't true even for the biggest brands in certain domains.
